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The constructor of today's crossword, John Kugelman, is mostly known for his Sunday crosswords: but somehow he managed to squeeze all that ken into a 15x15 grid, and the result is this fine Thursday oeuvre. Some particularly noteworthy clues include 2D, Anarchist Sacco, NICOLA (yes, it's Wikipedia time
Astronomy Daily | Space News: S04E87In this episode of Astronomy Daily, host Anna takes you on an exhilarating journey through the latest cosmic discoveries and developments that are reshaping our understanding of the universe. From galactic drama to groundbreaking lunar exploration, this episode is packed with insights that will ignite your curiosity about the cosmos.Highlights:- Galactic Drama in the Magellanic Clouds: Join us as we explore new research suggesting that the Large Magellanic Cloud may be tearing apart its smaller companion, the Small Magellanic Cloud. Using data from the Gaia Space Telescope, scientists reveal how massive stars within the SMC are being influenced by the gravitational forces of the LMC, offering a unique perspective on cosmic interactions.- Fram 2 Mission Insights: Hear firsthand accounts from the crew of the Fram 2 mission, the first humans to orbit Earth's poles. Discover their surprising experiences and the scientific experiments conducted during this groundbreaking journey, including their observations of the auroras from a polar orbit.- China's Lunar 3D Printing Plans: Learn about China's ambitious plans to 3D print building materials on the Moon using lunar soil. Scheduled for launch in 2028, this innovative technology aims to pave the way for sustainable lunar exploration and habitation, significantly reducing reliance on Earth-sourced materials.- James Webb's Stellar Discovery: Explore the groundbreaking findings from the James Webb Space Telescope, which has observed a star consuming a planet in a remarkable cosmic event. This discovery challenges previous theories and provides new insights into the life cycle of stars and their planetary systems.- Innovative Subsurface Robots for Lunar Exploration: Delve into the concept of autonomous subsurface robots designed to explore beneath the Moon's surface. These innovative machines could uncover valuable resources and help establish infrastructure for future lunar missions.For more cosmic updates, visit our website at astronomydaily.io. Join our community on social media by searching for #AstroDailyPod on Facebook, X, YouTubeMusic, TikTok, and our new Instagram account! Don't forget to subscribe to the podcast on Apple Podcasts, Spotify, iHeartRadio, or wherever you get your podcasts.Thank you for tuning in. This is Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe.00:00 - Welcome to Astronomy Daily01:05 - Large Magellanic Cloud's impact on Small Magellanic Cloud10:30 - Fram 2 mission crew experiences17:00 - China's lunar 3D printing technology22:15 - James Webb's discovery of a star consuming a planet27:30 - Subsurface robots for lunar exploration✍️ Episode ReferencesMagellanic Clouds Research[Nagoya University](https://www.nagoya-u.ac.jp/)Fram 2 Mission Details[SpaceX](https://www.spacex.com/)China's Lunar Plans[China National Space Administration](https://www.cnsa.gov.cn/)James Webb Discoveries[NASA](https://www.nasa.gov)Lunar Exploration Robots[Planetary Exploration Research](https://www.planetary.org/)Astronomy Daily[Astronomy Daily](http://www.astronomydaily.io/)Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-exciting-space-discoveries-and-news--5648921/support.
Massive star explosions may have triggered two mass extinctions in Earth's past. Actively feeding supermassive black holes could be good for life. The Large Magellanic Cloud may have a supermassive black hole. Astronomers may now have a better understanding of a repeating radio signal coming from deep space, Become a supporter of this podcast: https://www.spreaker.com/podcast/made-of-stars--4746260/support.
Astronomy Daily | Space News: S04E69In this illuminating episode of Astronomy Daily, host Anna guides you through a series of remarkable discoveries that expand our understanding of the universe. From the detection of oxygen in the most distant galaxy to revolutionary advancements in telescope technology, this episode is a treasure trove of cosmic insights that will leave you in awe.Highlights:- Oxygen in the Distant Galaxy: Dive into the groundbreaking discovery of oxygen in galaxy Jades GSZ14.0, the farthest galaxy ever observed, which reveals unexpected maturity in the early universe. This finding challenges existing models of galaxy formation and evolution, showcasing the remarkable capabilities of the James Webb Space Telescope and ALMA.- Supernovae and Mass Extinctions: Explore the intriguing theory that supernova explosions may have contributed to mass extinction events on Earth. New research suggests that nearby supernovae could have stripped our atmosphere of its ozone layer, exposing life to harmful radiation and leading to catastrophic consequences.- Revolutionary Telescope Technology: Uncover the innovative new flat lens designed by engineers at the University of Utah, which could revolutionize astronomical observations. This lightweight lens promises to replace traditional bulky optics, making advanced imaging more accessible and practical for both professional and amateur astronomers.- Extraordinary Nova Explosion: Learn about the recurrent nova LMCN1968.12A in the Large Magellanic Cloud, which shines nearly 100 times brighter than the sun during its eruptions. This nova's unique characteristics offer valuable insights into the behavior of cosmic explosions and their potential connections to supernovae.- Venus's Inferior Conjunction: Get ready for Venus's upcoming inferior conjunction, where it will pass between Earth and the Sun. While this event may not provide dramatic visuals, it offers a valuable opportunity for astronomers to refine their understanding of celestial mechanics and planetary movements.- Theoretical Dyson Swarms: Delve into the ambitious concept of Dyson swarms, hypothetical megastructures that advanced civilizations might build around stars. This study highlights the delicate balance between technological advancement and environmental preservation, raising important questions about our future energy needs.For more cosmic updates, visit our website at astronomydaily.io. Join our community on social media by searching for #AstroDailyPod on Facebook, X, YouTubeMusic, TikTok, and our new Instagram account! Don't forget to subscribe to the podcast on Apple Podcasts, Spotify, iHeartRadio, or wherever you get your podcasts.Thank you for tuning in. This is Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe.00:00 - Welcome to Astronomy Daily01:05 - Discovery of oxygen in distant galaxy10:30 - Supernovae and mass extinction theory17:00 - Revolutionary telescope lens technology22:15 - Extraordinary nova explosion insights27:30 - Venus's inferior conjunction32:00 - Theoretical Dyson swarms and energy needs✍️ Episode ReferencesOxygen in Distant Galaxy[NASA](https://www.nasa.gov)Supernovae and Extinction Events[Research Study](https://www.example.com)Revolutionary Telescope Technology[University of Utah](https://www.utah.edu)LMCN1968.12A Observations[Astronomy Journal](https://www.example.com)Venus's Inferior Conjunction[Adler Planetarium](https://www.adlerplanetarium.org/)Dyson Swarms Research[Science Direct](https://www.sciencedirect.com/)Astronomy Daily[Astronomy Daily](http://www.astronomydaily.io/)Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-space-news--5648921/support.
Althans, dat is de theorie. In deze aflevering kunt u horen hoe de vork in de steel zit.Runaway Stars Reveal Hidden Black Hole In Milky Way's Nearest Neighbor:https://www.cfa.harvard.edu/news/runaway-stars-reveal-hidden-black-hole-milky-ways-nearest-neighborHypervelocity Stars Trace a Supermassive Black Hole in the Large Magellanic Cloud:https://arxiv.org/pdf/2502.00102Implications of recent measurements of the Milky Way rotation for the orbit of the Large Magellanic Cloud:https://academic.oup.com/mnrasl/article/392/1/L21/974614GAIA satelliet:https://www.esa.int/Science_Exploration/Space_Science/Gaia_overviewInteractief GAIA satelliet 3D-model:https://scifleet.esa.int/model/gaia/Grote Magelhaense Wolk:https://www.esa.int/ESA_Multimedia/Images/2018/04/Large_Magellanic_CloudDe Zimmerman en Space podcast is gelicenseerd onder een Creative Commons CC0 1.0 licentie.http://creativecommons.org/publicdomain/zero/1.0
Astronomy Daily | Space News: S04E58In this episode of Astronomy Daily, host Anna takes you on an exhilarating journey through the latest advancements and discoveries in the cosmos. From classified space missions to lunar eclipses, this episode is packed with stories that highlight the ever-evolving landscape of space exploration.Highlights:- X37B Spaceplane's Latest Mission: Discover the impressive achievements of the US Space Force's X37B spaceplane, which recently completed a 434-day mission. We discuss its innovative aerobraking maneuver and the significance of its experiments in space domain awareness.- International Space Station Crew Rotation: Get the latest updates on Expedition 72 as NASA astronauts prepare for a crew transition aboard the ISS. Learn about the ongoing research into human adaptation to microgravity and the exciting activities taking place in this unique orbital laboratory.- Intuitive Machines' Lunar Mission Conclusion: We cover the dramatic end of Intuitive Machines' Nova Sea lander mission, which, despite landing on its side, managed to return valuable data. Explore the implications of this mission for future lunar exploration efforts.- NASA's Search for Artemis Mascot: Join us as we explore NASA's call for designers to create a zero gravity indicator for the Artemis 2 mission. This initiative connects creativity with space exploration, offering a unique opportunity for the global community. Details here: https://www.freelancer.com/contest/Moon-Mascot-NASA-Artemis-II-ZGI-Design-Challenge-2527909/details- Upcoming Total Lunar Eclipse: Mark your calendars for March 14 as we prepare for the first total lunar eclipse of 2025. We'll provide essential viewing information and discuss the significance of this celestial event.- Discovery of a Supermassive Black Hole: In a groundbreaking revelation, scientists have found evidence of a supermassive black hole in the Large Magellanic Cloud. Learn about the implications of this discovery and how it reshapes our understanding of our galactic neighborhood.For more cosmic updates, visit our website at astronomydaily.io. Join our community on social media by searching for #AstroDailyPod on Facebook, X, YouTubeMusic, and TikTok. Don't forget to subscribe to the podcast on Apple Podcasts, Spotify, iHeartRadio, or wherever you get your podcasts.Thank you for tuning in. This is Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe.00:00 - Welcome back to Astronomy Daily01:05 - X37B spaceplane mission update07:30 - ISS crew rotation news12:15 - Intuitive Machines' lunar mission update18:00 - NASA's Artemis mascot design contest22:30 - Upcoming total lunar eclipse details27:00 - Discovery of a supermassive black hole32:00 - Conclusion and upcoming content✍️ Episode ReferencesX37B Spaceplane Information[US Space Force](https://www.spaceforce.mil/)International Space Station Updates[NASA ISS](https://www.nasa.gov/iss)Intuitive Machines Mission Overview[Intuitive Machines](https://www.intuitivemachines.com/)NASA's Artemis Campaign[NASA Artemis](https://www.nasa.gov/specials/artemis/)Lunar Eclipse Viewing Information[NASA Eclipse](https://eclipse.gsfc.nasa.gov/)Supermassive Black Hole Research[ESA Gaia](https://www.esa.int/Science_Exploration/Space_Science/Gaia)Astronomy Daily[Astronomy Daily](http://www.astronomydaily.io/)Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-space-news--5648921/support.
Astronomy Daily - The Podcast: S04E45In this episode of Astronomy Daily, host Anna takes you on an exhilarating journey through the latest news and discoveries in the realm of space and astronomy. From ESA's Solar Orbiter's historic flyby of Venus to new insights from NASA's DART mission, this episode is brimming with cosmic revelations that will captivate your imagination.Highlights:- ESA's Solar Orbiter's Close Encounter with Venus: Witness history as the Solar Orbiter spacecraft performs its closest flyby of Venus, swooping just 379 km above the planet's surface. Discover how this maneuver not only assists in altering the spacecraft's trajectory but also sets the stage for unprecedented observations of the Sun's polar regions, crucial for understanding solar activity and space weather.- Uncovering a Cosmic Explosion: Delve into the intriguing discovery of a powerful cosmic explosion, designated XRT200515, found in archived data from NASA's Chandra X-Ray Observatory. This remarkable event, occurring in the Large Magellanic Cloud, presents a unique opportunity to explore the characteristics of rare astronomical phenomena through advanced machine learning techniques.- NASA's DART Mission Findings: Explore the groundbreaking results from NASA's DART mission, which not only nudged the asteroid Dimorphos off course but also fundamentally altered its shape and orbital characteristics. Learn how this data enhances our understanding of planetary defense and the nature of these celestial bodies.- Evidence of an Ocean on Callisto: Discover compelling new evidence suggesting that Jupiter's moon Callisto may harbor a subsurface ocean. Analyze how magnetic field data from NASA's Galileo spacecraft reveals the moon's potential as an ocean world, setting the stage for future exploration by upcoming missions.- Health Risks of Space Travel: Examine recent research that highlights the various health challenges astronauts face during extended space missions, from radiation exposure to the effects of microgravity on the human body. Understand the importance of developing countermeasures to ensure the safety of future deep space explorers.- Elon Musk's Controversial ISS Proposal: Engage in the brewing debate over SpaceX CEO Elon Musk's call to deorbit the International Space Station ahead of schedule. Explore the implications of this proposal in contrast to NASA's planned timeline and the ongoing significance of the ISS as a research platform for future missions.For more cosmic updates, visit our website at astronomydaily.io. Join our community on social media by searching for #AstroDailyPod on Facebook, X, YouTubeMusic, and TikTok. Don't forget to subscribe to the podcast on Apple Podcasts, Spotify, iHeartRadio, or wherever you get your podcasts.Thank you for tuning in. This is Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe.00:00 - Welcome back to Astronomy Daily01:05 - ESA's Solar Orbiter flyby of Venus07:30 - Discovery of cosmic explosion XRT20051512:15 - DART mission's impact on Dimorphos18:00 - Evidence of subsurface ocean on Callisto22:30 - Health risks associated with space travel27:00 - Elon Musk's ISS deorbit proposal32:00 - Conclusion and upcoming content✍️ Episode ReferencesESA's Solar Orbiter Mission[ESA Solar Orbiter](https://www.esa.int/Science_Exploration/Space_Science/Solar_Orbiter)NASA's Chandra X-Ray Observatory[NASA Chandra](https://www.nasa.gov/mission_pages/chandra/main/index.html)NASA's DART Mission Insights[NASA DART](https://www.nasa.gov/mission_pages/dart/main/index.html)Callisto's Magnetic Field Research[Galileo Mission](https://www.nasa.gov/mission_pages/galileo/overview/index.html)Health Effects of Space Travel[NASA Health Research](https://www.nasa.gov/health)Elon Musk's ISS Proposal[SpaceX](https://www.spacex.com)Astronomy Daily[Astronomy Daily](http://www.astronomydaily.io)Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-space-news-discoveries--5648921/support.
Astronomy Daily - The Podcast: S04E34In this episode of Astronomy Daily, host Anna takes you on a thrilling journey through the latest breakthroughs in space and astronomy. From the origins of water in the early universe to exciting developments in satellite launches and black hole discoveries, this episode is packed with insights that will ignite your curiosity about the cosmos.Highlights:- Water Formation in the Early Universe: Explore groundbreaking research suggesting that the first supernovas may have flooded the universe with water just 100 million years after the Big Bang, challenging our understanding of cosmic water formation and its implications for early life.- Rocket Lab's 2025 Launch: Get the scoop on Rocket Lab's first orbital launch of the year, carrying five satellites for Kinnes, and learn about the mission's significance in expanding global Internet of Things coverage.- Navigating Changes at NASA: Hear about Boeing's stark warning regarding the future of NASA's Space Launch System program, including potential layoffs and the impact of budget proposals on deep space exploration initiatives.- Supermassive Black Hole Discovery: Delve into the compelling evidence of a supermassive black hole in the Large Magellanic Cloud, revealed through hypervelocity stars, and its implications for our understanding of galaxy evolution.- Ancient Asteroids as Planetary Fragments: Uncover the intriguing possibility that two asteroids in our solar system might be remnants of ancient planetary embryos, providing a glimpse into the tumultuous early days of planetary formation.For more cosmic updates, visit our website at astronomydaily.io. Join our community on social media by searching for #AstroDailyPod on Facebook, X, YouTubeMusic, Tumblr, and TikTok. Don't forget to subscribe to the podcast on Apple Podcasts, Spotify, iHeartRadio, or wherever you get your podcasts.Thank you for tuning in. This is Ana signing off. Until next time, keep looking up and stay curious about the wonders of our universe.00:00 - Welcome back to Astronomy Daily01:02 - Water formation from early supernovas05:30 - Rocket Lab's IoT4UNME mission details10:15 - Boeing's warning on NASA's SLS program14:00 - Discovery of a supermassive black hole in the LMC18:20 - Potential ancient planetary fragments in the asteroid belt22:00 - Conclusion and upcoming content✍️ Episode ReferencesWater Formation Study[Water Formation Study](https://www.nature.com/articles)Rocket Lab Launch Information[Rocket Lab](https://www.rocketlabusa.com)NASA TV Program Updates[NASA TV Program](https://www.nasa.gov/exploration/sls)Supermassive Black Hole Research[Supermassive Black Hole](https://www.esa.int/Science_Exploration/Gaia)Asteroids as Planetary Fragments[Planetary Fragments](https://www.sciencedaily.com/releases/2023/10/231012104344.htm)Astronomy Daily[Astronomy Daily](http://www.astronomydaily.io)Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily--5648921/support.
A new asteroid with a 1% chance of hitting Earth in 2032, the European Space Agency is building a Lunar Lander platform, the largest structure in the Universe has been discovered, and how far away could we detect ourselves?
A new asteroid with a 1% chance of hitting Earth in 2032, the European Space Agency is building a Lunar Lander platform, the largest structure in the Universe has been discovered, and how far away could we detect ourselves?
The nebula in the Large Magellanic Cloud is home to some of the most massive stars ever observed. Learn more about your ad choices. Visit podcastchoices.com/adchoices
Astronomers have, for the first time ever, captured a close-up image of a star beyond our home Galaxy. WOH G64 is located 160,000 lightyears away in the Large Magellanic Cloud, a small satellite galaxy of our own Milky Way. Astronomer Jacco van Loon reveals how the team captured the image, and why it's so important. Learn more about your ad choices. Visit podcastchoices.com/adchoices
Astronomy Daily - The Podcast: S04E05Welcome to another fascinating edition of Astronomy Daily, your daily source for the most intriguing developments in space and astronomy. I'm Anna, and today we have a packed show highlighting the rapid advancements in space technology and exploration.Highlights:- Italy's Telecommunications Security Deal with SpaceX: Italy is finalizing a groundbreaking 1.5 billion euro deal with SpaceX to revolutionize its telecommunications security infrastructure. This five-year contract will leverage SpaceX's satellite network to provide secure communications, focusing on emergency response capabilities.- Electric Propulsion Technology Breakthroughs: The University of Virginia's research is pushing the boundaries of spacecraft propulsion with electric thrusters, offering a more efficient way to travel through space by ionizing xenon gas and creating high-speed plasma beams.- Quiet Black Hole Formation: A discovery in the Large Magellanic Cloud reveals that some massive black holes form quietly through direct collapse, challenging our traditional understanding of stellar death and black hole formation.- Timekeeping for Lunar Missions: NASA has developed a new lunar timekeeping system to address the complexities of time flow on the Moon, crucial for future lunar missions and operations.- Mars Insight Lander Observations: New images from NASA's Mars Reconnaissance Orbiter show how dust accumulation affects the Insight lander, providing insights into Mars's atmospheric processes.- Exciting Missions Planned for 2025: The year 2025 promises a busy schedule with multiple lunar missions, new heavy-lift rockets, and ambitious planetary explorations, including China's Tianwen 2 mission and ESA's BepiColombo flyby.For more cosmic updates, visit our website at astronomydaily.io. Join our community on social media by searching for #AstroDailyPod on Facebook, X, Tumblr, YouTube, YouTubeMusic, and TikTok. Share your thoughts and connect with fellow space enthusiasts.Thank you for tuning in. This is Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe.00:00 - Astronomy Daily brings you a roundup of the most interesting space news00:46 - Italy in final stages of deal with SpaceX to provide secure communications02:37 - University of Virginia researchers are developing revolutionary electric propulsion systems for spacecraft04:59 - Astronomers have found that some black holes form quietly without spectacular explosions09:23 - NASA's Insight lander has been dormant on Mars for two years now11:12 - Looking ahead to 2025, we're set for a busy year in space exploration13:07 - This is the end of today's episode of Astronomy Daily✍️ Episode ReferencesSpaceX[SpaceX](https://www.spacex.com/)University of Virginia[University of Virginia](https://www.virginia.edu/)NASA Artemis Program[NASA Artemis](https://www.nasa.gov/specials/artemis/)Mars Reconnaissance Orbiter[Mars Reconnaissance Orbiter](https://mars.nasa.gov/mro/)ESA BepiColombo[BepiColombo](https://www.esa.int/Science_Exploration/Space_Science/BepiColombo)Firefly Aerospace[Firefly Aerospace](https://firefly.com/)Blue Origin[Blue Origin](https://www.blueorigin.com/)Rocket Lab[Rocket Lab](https://www.rocketlabusa.com/)Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-the-podcast--5648921/support.
Prepárate para un viaje donde exploraremos los misterios del polvo estelar y cómo estas estrellas marcan los ciclos de creación en el universo. En este episodio de "El Viajero de la Ciencia", exploraremos un fascinante estudio publicado en Astronomy & Astrophysics en noviembre de 2024, titulado "Imaging the innermost circumstellar environment of the red supergiant WOH G64 in the Large Magellanic Cloud" . ¡No te pierdas ni un capítulo! Apúntate aquí a nuestro boletín: http://eepurl.com/iHax6s Enlace al artículo completo: https://www.aanda.org/articles/aa/full_html/2024/11/aa51820-24/aa51820-24.html
Astronomy Daily - The Podcast: S03E213Welcome to Astronomy Daily, your trusted source for the latest in space exploration and astronomical discoveries. I'm your host, Anna. Today, we have a captivating lineup of stories that will take you from the death throes of a massive star to the newest developments in lunar exploration.Highlights:- Supernova Spectacle: Witness the unprecedented close-up image of a star, WOH G64, in its final stages of life in the Large Magellanic Cloud. Discover the egg-shaped cocoon of gas and dust that surrounds this massive star, as it prepares for its explosive supernova finale.- ESA and JAXA's Next Big Cooperations: Explore the newly signed agreement between the European Space Agency and Japan Aerospace Exploration Agency, promising to accelerate space exploration with initiatives focusing on planetary defense, lunar exploration, and future missions to Mars.- SpaceX Launch Expansion: Delve into the FAA's draft Environmental Assessment that supports SpaceX's request to increase Starship launches at their Starbase facility, paving the way for revolutionary launch frequencies and advancing their lunar and Martian ambitions.- Canada's Lunar Rover Naming Contest: Join Canada's search for the perfect name for their first moon rover, part of the Artemis program. Learn how you can participate in this historic moment and contribute to the legacy of lunar exploration. Link below.- Youngest Exoplanet Discovery: Uncover the groundbreaking discovery of the youngest planet ever found using the transit method. This cosmic infant, Tidy1b, offers a rare glimpse into planetary formation during its earliest stages.- Starship Lunar Landing Plans: Discover new details about SpaceX and NASA's plans for landing astronauts on the moon using a specially modified version of Starship. Learn about the intricate maneuvers and safety measures being developed for the Artemis missions. Link below.For more cosmic updates, visit our website at astronomydaily.io. Sign up for our free Daily newsletter to stay informed on all things space. Join our community on social media by searching for #AstroDailyPod on Facebook, X, YouTubeMusic, Tumblr, and TikTok. Share your thoughts and connect with fellow space enthusiasts.Thank you for tuning in. This is Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe.Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-the-podcast--5648921/support.✍️ Episode ReferencesSpaceX[https://www.spacex.com](https://www.spacex.com)European Space Agency[https://www.esa.int](https://www.esa.int)Japan Aerospace Exploration Agency[https://www.jaxa.jp](https://www.jaxa.jp)Artemis Program[https://www.nasa.gov/specials/artemis](https://www.nasa.gov/specials/artemis)Canadian Space Agencyhttps://www.asc-csa.gc.ca/eng/news/articles/2024/2024-11-20-what-should-we-call-the-first-canadian-rover-on-the-moon.aspLarge Magellanic Cloud[https://en.wikipedia.org/wiki/Large_Magellanic_Cloud](https://en.wikipedia.org/wiki/Large_Magellanic_Cloud)NASA[https://www.nasa.gov](https://www.nasa.gov)Axiom Space[https://www.axiomspace.com](https://www.axiomspace.com)HeroX Websitehttps://www.herox.com/NASASouthPoleSafetyAstronomy Daily[https://astronomydaily.io](https://astronomydaily.io)
What's in December's night sky? Royal Observatory Greenwich astronomers Imo and Jess talk through some of this month's must-see cosmic objects in this podcast. Also discussed are this month's cosmic news stories. They cover a recent study on the nature of the Large Magellanic Cloud, and the starship test launches! Join us on X at the start of December to be part of the conversation.
Astronomy Daily - the Podcast: S03E207Welcome to Astronomy Daily, your ultimate source for the latest in space and Astronomy news. I'm your host, Anna, and today we have a captivating array of stories that delve into the mysteries of the universe and the cutting-edge advancements in space technology.Highlights:- Challenging Einstein's Theories: Explore groundbreaking research from the Universities of Geneva and Toulouse that tests the limits of Einstein's theories. Discover how data from the Dark Energy Survey reveals gravitational effects that deviate from Einstein's predictions, especially during the universe's accelerated expansion phase.- Space Travel and Human Aging: Uncover new insights into how spaceflight accelerates biological aging processes. Learn about the parallels between the effects of space travel on astronauts and the natural aging process on Earth, and the implications for future space exploration and healthcare.- Advancements in Satellite Servicing: Delve into Northrop Grumman's upcoming Mission Robotic Vehicle launch in 2026, featuring robotic arms developed by the U.S. Naval Research Laboratory. Understand how this technology will revolutionize satellite maintenance and extend the operational life of geostationary satellites.- NASA's Artificial Clouds Experiment: Witness NASA's stunning experiment in Norway's auroral skies, creating artificial clouds to study atmospheric dynamics. Learn how this experiment illuminates the complex interactions in the turbopause region and its significance for space weather research.- Fireball Over North America: Relive the spectacular sight of a fireball lighting up the skies over North America, captured by both ground-based observers and NOAA satellites. Understand the science behind these brilliant meteor events and their cosmic origins.- NASA's Tracers Mission Update: Get the latest on NASA's Tracers mission as it completes its twin spacecraft, aiming to study magnetic reconnection and space weather phenomena. Discover how this mission will enhance our understanding of the sun-Earth interaction.- Large Magellanic Cloud's Galactic Encounter: Explore the survival story of the Large Magellanic Cloud as it navigates a close encounter with the Milky Way. Learn how Hubble's observations reveal the effects of ram pressure stripping on this dwarf galaxy's gaseous halo.For more cosmic updates, visit our website at astronomydaily.io. Sign up for our free Daily newsletter to stay informed on all things space. Join our community on social media by searching for #AstroDailyPod on Facebook, X, YouTubeMusic, and TikTok. Share your thoughts and connect with fellow space enthusiasts.Thank you for tuning in. This is Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe.Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-the-podcast--5648921/support.
Astronomy Daily - The Podcast: S03E164Welcome to Astronomy Daily, your source for the latest space and Astronomy news. I'm your host, Anna, and today we have an exciting lineup of stories that span from Earth's orbit to distant galaxies. Buckle up and get ready for a thrilling journey through the cosmos.Highlights:- Spaceflight Radiation Exposure: During NASA's Artemis I mission, scientists gathered crucial data on radiation exposure using mannequins and advanced sensors. Findings show that enhanced radiation shielding areas provided up to four times more protection, validating spacecraft design for future missions.- Low Gravity Effects on Heart Cells: Researchers sent human bioengineered heart tissue samples to the ISS. The results revealed significant weakening and disruptions in normal rhythmic beating patterns, highlighting potential health risks for astronauts on extended missions.- SETI's Search for Alien Technology: In an unprecedented study, scientists used the Murchison Widefield Array to observe 2800 galaxies, searching for technosignatures. While no definitive evidence was found, this research opens new possibilities for future SETI efforts.- Milky Way's Unique Characteristics: The SAGA survey studied 101 satellite systems similar to our Milky Way, revealing that the number of satellite galaxies varies widely. Our galaxy's relatively low satellite count, despite having the Large Magellanic Cloud, hints at a unique history.- Mars's Missing Atmosphere: New research suggests Mars's atmosphere may have been absorbed by minerals in Martian clays over billions of years. This theory offers a potential explanation for Mars's transformation and raises the possibility of utilizing trapped methane for future missions.For more space news, be sure to visit our website at astronomydaily.io. There you can sign up for our free Daily newsletter, catch up on all the latest space and Astronomy news with our constantly updating newsfeed, and listen to all our back episodes.Don't forget to follow us on social media. Just search for #AstroDailyPod on Facebook, X, YouTubeMusic, and TikTok.Thank you for tuning in. This is Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe.Sponsor Links:NordVPNNordPassMalwarebytesProton MailOld Glory - Iconic Music and Sports Fan MerchBecome a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-the-podcast--5648921/support.
Astronomy Daily - The Podcast: 21st September 2024Welcome to Astronomy Daily, your go-to source for the latest space and Astronomy news. I'm your host, Anna, and today we have an episode packed with groundbreaking stories. From India's ambitious new space projects and SpaceX's plans to catch Starship, to exciting discoveries about water on the moon, groundbreaking observations from a new X-ray telescope, and concerns about satellite interference with radio Astronomy. Let's dive right in!Highlights:- India's Space Ambitions: India has greenlit an ambitious slate of space projects, allocating a substantial $2.7 billion to push the boundaries of its space capabilities. At the forefront is the Chandrayaan IV mission, a bold lunar sample return effort targeting the moon's south pole. Equally exciting is the Shukrayan mission, India's first Venus orbiter, now targeted for 2028. Perhaps most ambitious is the Bharatiya Antariksh Station (BAS), India's first space station module, slated for launch by the end of 2028 with full operational status expected by 2035. These projects highlight India's growing expertise and determination to become a key player in the global space arena.- SpaceX's Starship Catching Plans: SpaceX is gearing up for another groundbreaking achievement with its upcoming Starship test flight. The company plans to catch the massive Super Heavy first stage booster using the chopstick arms of the launch tower at their Starbase facility in Texas. This ambitious maneuver, if successful, would take rocket reusability to the next level, dramatically reducing turnaround time between flights. Regulatory reviews have delayed the launch, but the FAA is expected to complete its assessment by late November.- Chinese Reusable Rocket Technology: Chinese private space companies, Deep Blue Aerospace and Landspace, are making significant strides in developing reusable rocket technology. Both firms have conducted impressive high-altitude hop tests with their prototype vehicles, aiming to develop fully reusable orbital launchers. These tests represent significant progress for China's commercial space sector, working towards cost-effective reusable launch capabilities.- Abundant Water on the Moon: New research reveals that water is far more abundant on the moon than previously thought. Data from NASA's Moon Mineralogy Mapper shows that water and hydroxyl molecules are widespread across the lunar surface, not just confined to the poles. This discovery opens up possibilities for more flexible mission planning and could reduce the need to transport water from Earth, making long-term lunar missions more sustainable.- XRISM's Groundbreaking Observations: Japan's X-ray Imaging and Spectroscopy Mission (XRISM) has unveiled its first results, capturing stunning observations of a supermassive black hole in galaxy NGC 4151 and a supernova remnant in the Large Magellanic Cloud. These observations are revolutionizing our understanding of the X-ray universe, with over 3000 proposals submitted for future studies.- Satellite Interference with Radio Astronomy: New research reveals that SpaceX's second-generation V2 mini Starlink satellites are emitting up to 32 times more radio waves than their predecessors, posing a significant threat to radio Astronomy. This underscores the urgent need for dialogue between the Astronomy community and satellite companies to find solutions that allow both Internet access and scientific research to coexist.For more space news, be sure to visit our website at astronomydaily.io. There you can sign up for our free Daily newsletter, catch up on all the latest stories with our constantly updating newsfeed, and listen to all our past episodes.Don't forget to follow us on social media. Just search for #AstroDailyPod on Facebook, X, YouTubeMusic, and TikTok.Thank you for tuning in. This is Anna signing off. Until next time, keep looking up.Sponsor Links:NordVPNNordPassMalwarebytesProton MailOld Glory - Iconic Music & Sports Fan Merch Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-the-podcast--5648921/support.
A massive star in a nearby galaxy may have winked out of existence with little or no pyrotechnics. Instead of blasting itself to bits as a supernova, leaving behind a neutron star or black hole, it skipped the “blasting” stage. Instead, the entire star collapsed to form a black hole. VFTS 243 is a binary system in the Large Magellanic Cloud, a companion galaxy to the Milky Way. One member is a star that’s about two dozen times as massive as the Sun, and more than 150,000 times brighter. The other is a black hole about 10 times the Sun’s mass. A team of astronomers looked for evidence that the star that formed the black hole had exploded as a supernova – the likely fate of most stars at least eight times the Sun’s mass. The supernova forms when the star’s core collapses and its outer layers fall inward, then rebound. Such a blast would leave a cloud of debris. It might also give the black hole a strong “kick” away from the companion star. The astronomers found no evidence of either. There was no debris from an explosion. And the bright star and the black hole follow an almost circular orbit around each other. That suggests there was little or no interaction between them when the black hole formed. Almost the entire mass of the star must have collapsed to form the black hole. So the star that give birth to the black hole in VFTS 243 might simply have vanished from the sky. Script by Damond Benningfield
Welcome to Astronomy Daily, your friendly guide to all things celestial. I'm your host, Anna, and today we'll be diving into some fascinating stories from the world of Astronomy and space exploration. In this episode, we have an exciting lineup that includes groundbreaking achievements and stellar discoveries. So sit back, relax, and let's embark on this cosmic journey together.- NASA and JAXA's Laser Signal Exchange: In an impressive feat of international collaboration, NASA and JAXA have successfully exchanged laser signals between NASA's Lunar Reconnaissance Orbiter (LRO) and JAXA's Smart Lander for Investigating Moon (SLIM) on the lunar surface. Despite the SLIM lander's retroreflector facing sideways, the teams managed to overcome the challenge, showcasing the resilience and advanced potential of lunar retroreflectors.- Discovery of a Second Generation Star: Scientists have made a groundbreaking discovery of a rare second-generation star in the Large Magellanic Cloud. This find sheds new light on the early universe's element formation processes, offering valuable insights into how the universe's first stars operated outside our galactic neighborhood.- ULA's Final Atlas V Rocket Mission: United Launch Alliance is gearing up for a historic final mission using the Atlas V rocket for the US Space Force. This mission, designated USSF 51, marks the culmination of nearly two decades of reliable service from the Atlas V, carrying a top-secret payload for the US Space Force Systems Command.- Rocket Lab's Mars Mission Preparation: Rocket Lab is preparing to launch twin spacecraft to Mars for NASA's ESCAPADE mission. These twin explorers, named Blue and Gold, aim to study plasma and magnetic fields around Mars, providing valuable insights into the planet's climate evolution.Don't forget to visit our website at astronomydaily.io to sign up for our free daily newsletter, catch up on all the latest space and astronomy news, and listen to our previous episodes. Follow us on social media by searching for AstroDailyPod on Facebook, X, YouTubeMusic, and TikTok. Stay curious, keep exploring, and remember the universe is vast and full of wonders just waiting to be discovered. Until next time, keep looking up and dreaming big.www.bitesz.comBecome a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-the-podcast--5648921/support.
The Small Magellanic Cloud is a satellite galaxy of the Milky Way. It's about 200,000 light-years away, it contains hundreds of millions of stars, and it's easily visible to the eye alone — from the southern hemisphere. And it may actually consist of two separate but related halves — two galaxies for the price of one. Astronomers had suggested that possibility almost four decades ago. And a recent study provided the best evidence yet to support the idea. It found two large star-forming regions that are separated by about 15,000 light-years. One lines up in front of the other, making it hard to see them as individual objects. A team studied the galaxy in several ways. It found that gas and dust are split into two distinct regions. Their material moves in different ways, and has a different composition. The researchers also studied hot, young, bright stars. That also revealed two separate regions. And like the gas, the stars in the regions move in different ways, and have a slightly different makeup. The team said the two regions could be remnants of two galaxies that came together long ago. On the other hand, the region that's closer to us could be the main body of the galaxy. The region behind it then could be a tail of stars and gas pulled out by the gravity of the nearby Large Magellanic Cloud, which is bigger and heavier. Either way, this close companion to the Milky Way may be more than meets the eye. Script by Damond Benningfield
SpaceTime with Stuart Gary | Astronomy, Space & Science News
The Space, Astronomy & Science Podcast.SpaceTime Series 27 Episode 40*Magnetic Mysteries at the Milky Way's HeartThe Event Horizon Telescope has revealed organized magnetic fields swirling at the periphery of Sagittarius A*, the supermassive black hole at the Milky Way's core. In a groundbreaking observation, astronomers have captured these fields in polarized light, finding remarkable similarities to the black hole in galaxy M87. This discovery suggests that strong magnetic fields could be a universal trait among black holes, influencing how they interact with their surrounding matter. The study's implications stretch far beyond the iconic Sagittarius A*, offering a glimpse into the enigmatic behavior of black holes and their powerful ejections into space.*The Birth of Blue Supergiants Through Stellar MergersBlue supergiants, some of the universe's most luminous and massive stars, have long puzzled astronomers due to their abundance and solitary nature. A new study posits that these cosmic behemoths, often found alone, could be the result of binary star systems merging. This revelation, derived from simulations and observations in the Large Magellanic Cloud, challenges previous theories and suggests that stellar mergers play a pivotal role in the life cycle of galaxies and their stellar populations.*Webb Telescope Unveils the Star-Forming Tendrils of NGC 604NASA's James Webb Space Telescope peeks into NGC 604, a vibrant nursery of star formation within the Triangulum Galaxy, M33. Webb's infrared gaze has uncovered the intricate dance of star birth, highlighting massive blue stars and intricate gas filaments. This detailed view of NGC 604, a region teeming with over 200 massive stars, offers astronomers a rare opportunity to study these celestial giants at a critical stage in their evolution, providing new insights into the complex processes that shape galaxies.*New Crew Arrives at the International Space StationThe Soyuz MS-25 mission has successfully delivered a trio of spacefarers to the International Space Station after an initial launch delay. The mission continues the tradition of international partnership in space, as the ISS remains one of the few collaborative ventures between Russia and the West amidst geopolitical tensions.For more SpaceTime and to support the show, visit our website at https://spacetimewithstuartgary.com where you can access our universal listen link, find show notes, and learn how to become a patron. Listen to SpaceTime on your favorite podcast app with our universal listen link: https://spacetimewithstuartgary.com/listen and access show links via https://linktr.ee/biteszHQ. Support the show: https://www.spreaker.com/podcast/spacetime-with-stuart-gary--2458531/support. For more space and astronomy podcasts, visit our HQ at https://bitesz.com.https://spacetimewithstuartgary.com https://bitesz.com This week's guests include: WEBB senior Project Scientist Jane Rigby Josef Aschbacher, Director of ESA Earth Observation Programs Michael Rast, ESA's Earth Observation Senior Advisor. And our regular guests: Alex Zaharov-Reutt from techadvice.life Tim Mendham from Australian Skeptics Jonathan Nally from Sky and Telescope Magazine
Une équipe d'astrophysiciens a pu estimer la masse du Grand Nuage de Magellan (LMC) en utilisant la cinématique de 30 amas globulaires de la galaxie naine. Ils ont effectué cette mesure en combinant les mouvements propres mesurés avec le télescope Hubble et le télescope Gaia. Ils publient leur étude dans The Astrophysical Journal. https://www.ca-se-passe-la-haut.fr/2024/03/le-grand-nuage-de-magellan-pese-grace.html Source The Mass of the Large Magellanic Cloud from the Three-Dimensional Kinematics of its Globular ClustersLaura Watkins et al.accepté pour publication dans The Astrophysical Journalhttps://arxiv.org/abs/2401.14458
NASA's James Webb Space Telescope has found the best evidence yet for emission from a neutron star at the site of a recently observed supernova. The supernova, known as SN 1987A, was a core-collapse supernova, meaning the compacted remains at its core formed either a neutron star or a black hole. Evidence for such a compact object has long been sought, and while indirect evidence for the presence of a neutron star has previously been found, this is the first time that the effects of high-energy emission from the probable young neutron star have been detected.Supernovae – the explosive final death throes of some massive stars – blast out within hours, and the brightness of the explosion peaks within a few months. The remains of the exploding star will continue to evolve at a rapid rate over the following decades, offering a rare opportunity for astronomers to study a key astronomical process in real time.Supernova 1987AThe supernova SN 1987A occurred 160,000 light-years from Earth in the Large Magellanic Cloud. It was first observed on Earth in February 1987, and its brightness peaked in May of that year. It was the first supernova that could be seen with the naked eye since Kepler's Supernova was observed in 1604.About two hours prior to the first visible-light observation of SN 1987A, three observatories around the world detected a burst of neutrinos lasting only a few seconds. The two different types of observations were linked to the same supernova event, and provided important evidence to inform the theory of how core-collapse supernovae take place. This theory included the expectation that this type of supernova would form a neutron star or a black hole. Astronomers have searched for evidence for one or the other of these compact objects at the center of the expanding remnant material ever since.Indirect evidence for the presence of a neutron star at the center of the remnant has been found in the past few years, and observations of much older supernova remnants –such as the Crab Nebula – confirm that neutron stars are found in many supernova remnants. However, no direct evidence of a neutron star in the aftermath of SN 1987A (or any other such recent supernova explosion) had been observed, until now.The James Webb Space Telescope has observed the best evidence yet for emission from a neutron star at the site of a well-known and recently-observed supernova known as SN 1987A. At left is a NIRCam (Near-Infrared Camera) image released in 2023. The image at top right shows light from singly ionized argon (Argon II) captured by the Medium Resolution Spectrograph (MRS) mode of MIRI (Mid-Infrared Instrument). The image at bottom right shows light from multiply ionized argon captured by the NIRSpec (Near-Infrared Spectrograph). Both instruments show a strong signal from the center of the supernova remnant. This indicated to the science team that there is a source of high-energy radiation there, most likely a neutron star.NASA, ESA, CSA, STScI, C. Fransson (Stockholm University), M. Matsuura (Cardiff University), M. J. Barlow (University College London), P. J. Kavanagh (Maynooth University), J. Larsson (KTH Royal Institute of Technology)Claes Fransson of Stockholm University, and the lead author on this study, explained: “From theoretical models of SN 1987A, the 10-second burst of neutrinos observed just before the supernova implied that a neutron star or black hole was formed in the explosion. But we have not observed any compelling signature of such a newborn object from any supernova explosion. With this observatory, we have now found direct evidence for emission triggered by the newborn compact object, most likely a neutron star.”Webb's Observations of SN 1987AWebb began science observations in July 2022, and the Webb observations behind this work were taken on July 16, making the SN 1987A remnant one of the first objects observed by Webb. The team used the Medium Resolution Spectrograph (MRS) mode of Webb's MIRI (Mid-Infrared Instrument), which members of the same team helped to develop. The MRS is a type of instrument known as an Integral Field Unit (IFU).IFUs are able to image an object and take a spectrum of it at the same time. An IFU forms a spectrum at each pixel, allowing observers to see spectroscopic differences across the object. Analysis of the Doppler shift of each spectrum also permits the evaluation of the velocity at each position.Spectral analysis of the results showed a strong signal due to ionized argon from the center of the ejected material that surrounds the original site of SN 1987A. Subsequent observations using Webb's NIRSpec (Near-Infrared Spectrograph) IFU at shorter wavelengths found even more heavily ionized chemical elements, particularly five times ionized argon (meaning argon atoms that have lost five of their 18 electrons). Such ions require highly energetic photons to form, and those photons have to come from somewhere.“To create these ions that we observed in the ejecta, it was clear that there had to be a source of high-energy radiation in the center of the SN 1987A remnant,” Fransson said. “In the paper we discuss different possibilities, finding that only a few scenarios are likely, and all of these involve a newly born neutron star.”More observations are planned this year, with Webb and ground-based telescopes. The research team hopes ongoing study will provide more clarity about exactly what is happening in the heart of the SN 1987A remnant. These observations will hopefully stimulate the development of more detailed models, ultimately enabling astronomers to better understand not just SN 1987A, but all core-collapse supernovae.These findings were published in the journal Science.The James Webb Space Telescope is the world's premier space science observatory. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and the Canadian Space Agency.
fWotD Episode 2437: Supernova Welcome to featured Wiki of the Day where we read the summary of the featured Wikipedia article every day.The featured article for Saturday, 6 January 2024 is Supernova.A supernova (pl.: supernovae or supernovas) is a powerful and luminous explosion of a star. A supernova occurs during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway nuclear fusion. The original object, called the progenitor, either collapses to a neutron star or black hole, or is completely destroyed to form a diffuse nebula. The peak optical luminosity of a supernova can be comparable to that of an entire galaxy before fading over several weeks or months.The last supernova directly observed in the Milky Way was Kepler's Supernova in 1604, appearing not long after Tycho's Supernova in 1572, both of which were visible to the naked eye. The remnants of more recent supernovae have been found, and observations of supernovae in other galaxies suggest they occur in the Milky Way on average about three times every century. A supernova in the Milky Way would almost certainly be observable through modern astronomical telescopes. The most recent naked-eye supernova was SN 1987A, which was the explosion of a blue supergiant star in the Large Magellanic Cloud, a satellite of the Milky Way.Theoretical studies indicate that most supernovae are triggered by one of two basic mechanisms: the sudden re-ignition of nuclear fusion in a white dwarf, or the sudden gravitational collapse of a massive star's core.In the re-ignition of a white dwarf, the object's temperature is raised enough to trigger runaway nuclear fusion, completely disrupting the star. Possible causes are an accumulation of material from a binary companion through accretion, or by a stellar merger.In the case of a massive star's sudden implosion, the core of a massive star will undergo sudden collapse once it is unable to produce sufficient energy from fusion to counteract the star's own gravity, which must happen once the star begins fusing iron, but may happen during an earlier stage of metal fusion. Supernovae can expel several solar masses of material at velocities up to several percent of the speed of light. This drives an expanding shock wave into the surrounding interstellar medium, sweeping up an expanding shell of gas and dust observed as a supernova remnant. Supernovae are a major source of elements in the interstellar medium from oxygen to rubidium. The expanding shock waves of supernovae can trigger the formation of new stars. Supernovae are a major source of cosmic rays. They might also produce gravitational waves, though thus far gravitational waves have been detected only from the mergers of black holes and neutron stars.This recording reflects the Wikipedia text as of 00:03 UTC on Saturday, 6 January 2024.For the full current version of the article, see Supernova on Wikipedia.This podcast uses content from Wikipedia under the Creative Commons Attribution-ShareAlike License.Visit our archives at wikioftheday.com and subscribe to stay updated on new episodes.Follow us on Mastodon at @wikioftheday@masto.ai.Also check out Curmudgeon's Corner, a current events podcast.Until next time, I'm Justin Neural.
This edition of Space Nuts is brought to you by Incogni....the new name in online data protection. Get 60% off your subscription by visiting www.incogni.com/spacenuts ...Do you want to stay up to date with the latest discoveries in our solar system, particularly when it comes to potential new planets? Are you eager to uncover the mysteries hidden in the depths of the Kuiper Belt? If so, we have the solution you've been searching for. In this episode, Fred and I will be revealing the key findings and ongoing search efforts for an elusive celestial body, which could potentially be a new planet in the Kuiper Belt. By diving into this topic, you will gain a profound understanding of the quest to unravel the secrets of our cosmic neighbourhood and get closer to unveiling the existence of an undiscovered planetary world. In this episode, you will be able to: · Venture into an exciting chapter of space exploration identifying the potential new planet in the Kuiper Belt. · Peek at the nearest supernova through the advanced and prestigious James Webb Space Telescope. · Embark on the intriguing search mission for Planet Nine, interpreting its cosmic significance. If you're living in rubbish, you don't get the guernsey. - Andrew Dunkley Exploration of potential new planet: Amidst the vast expanse of the Kuiper Belt, researchers have detected signals suggesting a new planetary object. This fascinating discovery stems from patterns found in the orbits of hitherto-known objects within the belt. If confirmed, this celestial body could either be classified as a dwarf planet like Pluto, or a full-fledged planet, provided it has cleared the debris in its orbit, shifting our perception of the solar system. The resources mentioned in this episode are: · Visit the website of the National Astronomical Observatory of Japan (NAOJ) to learn more about their research on dwarf planets and the Kuiper Belt. · Check out the Astronomical Journal, one of the world's leading journals on astronomy, to read the study on the objects in the Kuiper Belt and their orbits. · Explore the Kuiper Belt and learn about the various objects within it, including dwarf planets, asteroids, and more. · Stay informed about the latest discoveries in astronomy by following news sources and publications that report on space exploration and research. · Keep an eye out for updates on the potential ninth planet and its discovery, as scientists continue to study the Kuiper Belt and search for its gravitational influence. · Consider becoming an amateur astronomer and join a community of stargazers who observe celestial objects like Jupiter and Saturn, potentially contributing to scientific discoveries. · Learn more about the James Webb Space Telescope and its capabilities in observing distant objects, including supernovae, by visiting its official website. · Stay updated on the latest news and findings from the James Webb Space Telescope, as it continues to provide new insights into the universe. · Explore the Large Magellanic Cloud and The key moments in this episode are:00:00:00 - Introduction, 00:02:32 - Discovery of a Potential New Planet in the Kuiper Belt, 00:09:40 - The Definition of a Planet, 00:10:57 - Possibility of a New Planet Replacing Planet Nine, 00:11:23 - Size and Orbit of the Potential New Planet, 00:16:11 - "Supernova 1987 A Discovery", 00:20:46 - "Structure of Supernova Remnants", 00:23:19 - "Light Echoes and Supernova Explorations", 00:26:07 - "Amateur Observations of Supernova Remnants", 00:27:15 - "Neutron Star and Future Observations", 00:32:18 - "Space, Time, and the Hubble Flow", 00:34:24 - "Frozen Universe", 00:35:30 - "Listener Appreciation", 00:36:01 - "Listener Bets", 00:38:50 - "Understanding Light from the Early Universe", Exploration of potential new planet: Amidst the vast expanse of the Kuiper Belt, researchers have detected signals suggesting a new planetary object. This fascinating discovery stems from patterns found in the orbits of hitherto-known objects within the belt. If confirmed, this celestial body could either be classified as a dwarf planet like Pluto, or a full-fledged planet, provided it has cleared the debris in its orbit, shifting our perception of the solar system. Nearest supernova insights: The recent observation of the closest supernova in modern history by the James Webb Space Telescope provides profound insights into these stellar explosions' nature. Investigating the remnants of these violent outbursts helps us better understand the universe's history and structure. Analysing high-resolution imaging from telescopes like the Webb offers unique opportunities to examine the remnants and aftereffects of these cosmic explosions in unprecedented detail. Hunt for Planet Nine: The enigmatic Planet Nine continues to elude astronomers. Currently, the search is centered around Extreme Trans-Neptunian Objects (ETNOs), deeply entrenched far beyond the sun's reach. The discovery of a new planet in the Kuiper Belt may modify our understanding of what constitutes Planet Nine and could stir up further interest in this intriguing celestial detective story. · www.spacenuts.io · https://www.twitter.com/spacenutspod · https://www.linkedin.com/in/biteszhq · https://www.youtube.com/@spacenutspodcast · https://www.facebook.com/spacenutspodcastThis show is part of the Spreaker Prime Network, if you are interested in advertising on this podcast, contact us at https://www.spreaker.com/show/2631155/advertisement
A companion galaxy to the Milky Way is windy. It's blowing enough hot gas in our direction to make 85 million stars as massive as the Sun. No one knows just what will happen to the gas. But some of it could fall into the Milky Way, where it really could form new stars. The LMC -- the Large Magellanic Cloud -- is about 160,000 light-years away. It's the biggest galaxy that orbits the Milky Way -- about one percent of the Milky Way's mass. It's home to giant clouds of gas and dust that are spawning new stars. That includes one of the most massive of all stellar nurseries. Some of the LMC's stars are big and heavy. They live short but spectacular lives, then blast themselves to bits as supernovas. That sends their outer layers of gas racing into space at high speeds. The gas rams into nearby clouds, pushing some of their material as well. And that's what's driving the winds. Astronomers have measured the winds on the side of the LMC that faces our way. They've found top speeds of about 360,000 miles per hour. Some of the gas may be flowing into a long ribbon of gas, dust, and stars that connects the LMC and the Milky Way. That could fuel the birth of more stars. And more of the gas could wind up in the Milky Way itself -- adding to our home galaxy's already impressive population of stars. Script by Damond Benningfield Support McDonald Observatory
The 365 Days of Astronomy, the daily podcast of the International Year of Astronomy 2009
From June 21, 2022. Researchers using the Chandra X-ray Observatory have found that a known pulsar is moving through a supernova remnant at over one million miles per hour. Plus, the life and death of stars, new pictures of the Large Magellanic Cloud, and all of the SpaceX rocket launches. New images from old data: NASA JPL press release: https://www.jpl.nasa.gov/news/new-images-using-data-from-retired-telescopes-reveal-hidden-features CFA press release on Barnard's Loop: https://www.cfa.harvard.edu/news/did-supernovae-help-form-barnards-loop “A 3D View of Orion: I. Barnard's Loop” Michael Foley et al., 2022 June 16, Authorea preprint: https://www.authorea.com/users/489216/articles/573026-a-3d-view-of-orion-i-barnard-s-loop?commit=9baa721710bfb900a6691da2b20c523fef1f7f53 An animation of the 3D map: https://www.youtube.com/watch?v=6LmWXfOQ7qs&t=152s We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank you! ------------------------------------ Do go visit http://www.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just click!) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.
Pensar en el imprevisto de que otro tipo de vida nos detecte cuando nos sentimos descubridores de un universo vacío es algo que me llamó la atención. En este cuento veamos la percepción de otro tipo de vida de los exploradores que atraviesan por vez primera un universo distante. Espero disfruten este relato, Alberto Oriza Música Cortesía de: Pixbay https://pixabay.com/ · space-atmospheric-background-124841 Imágenes Tomada de: https://esahubble.org/images/potw1441a/ · Hubble mosaic of the majestic Sombrero Galaxy · A poster-size image of the beautiful barred spiral galaxy NGC 1300 · Galactic wreckage in Stephan's Quintet · ACS image of NGC 5866 · Turquoise-tinted plumes in the Large Magellanic Cloud
Strong Dark Matter Self-interactions Diversify Halo Populations Within and Surrounding the Milky Way by Daneng Yang et al. on Monday 28 November We perform a high-resolution cosmological zoom-in simulation of a Milky Way (MW)-like system, which includes a realistic Large Magellanic Cloud analog, using a large differential elastic dark matter self-interaction cross section that reaches $approx 100~mathrm{cm}^2 mathrm{g}^{-1}$ at relative velocities of $approx 10~mathrm{km s}^{-1}$, motivated by observational features of dwarf galaxies within and surrounding the MW. We explore the effects of dark matter self-interactions on satellite, splashback, and isolated halos through their abundance, central densities, maximum circular velocities, orbital parameters, and correlations between these variables. We use an effective constant cross section model to analytically predict the stages of our simulated halos' gravothermal evolution, demonstrating that deviations from the collisionless $R_{rm max}$--$V_{rm max}$ relation can be used to select deeply core-collapsed halos, where $V_{rm max}$ is a halo's maximum circular velocity and $R_{rm max}$ is the radius at which it occurs. We predict that a sizable fraction ($approx 20%$) of subhalos with masses down to $approx 10^8~M_{odot}$ are deeply core-collapsed in our SIDM model. Core-collapsed systems form $approx 10%$ of the total isolated halo population down to the same mass; these isolated, core-collapsed halos would host faint dwarf galaxies in the field with extremely steep central density profiles reminiscent of the Tucana dwarf galaxy. Finally, most halos with masses above $approx 10^9~M_{odot}$ are core-forming in our simulation. Our study thus demonstrates how self-interactions diversify halo populations in an environmentally-dependent fashion within and surrounding MW-mass hosts, providing a compelling avenue to address the diverse dark matter distributions of observed dwarf galaxies. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.13768v1
Strong Dark Matter Self-interactions Diversify Halo Populations Within and Surrounding the Milky Way by Daneng Yang et al. on Sunday 27 November We perform a high-resolution cosmological zoom-in simulation of a Milky Way (MW)-like system, which includes a realistic Large Magellanic Cloud analog, using a large differential elastic dark matter self-interaction cross section that reaches $approx 100~mathrm{cm}^2 mathrm{g}^{-1}$ at relative velocities of $approx 10~mathrm{km s}^{-1}$, motivated by observational features of dwarf galaxies within and surrounding the MW. We explore the effects of dark matter self-interactions on satellite, splashback, and isolated halos through their abundance, central densities, maximum circular velocities, orbital parameters, and correlations between these variables. We use an effective constant cross section model to analytically predict the stages of our simulated halos' gravothermal evolution, demonstrating that deviations from the collisionless $R_{rm max}$--$V_{rm max}$ relation can be used to select deeply core-collapsed halos, where $V_{rm max}$ is a halo's maximum circular velocity and $R_{rm max}$ is the radius at which it occurs. We predict that a sizable fraction ($approx 20%$) of subhalos with masses down to $approx 10^8~M_{odot}$ are deeply core-collapsed in our SIDM model. Core-collapsed systems form $approx 10%$ of the total isolated halo population down to the same mass; these isolated, core-collapsed halos would host faint dwarf galaxies in the field with extremely steep central density profiles reminiscent of the Tucana dwarf galaxy. Finally, most halos with masses above $approx 10^9~M_{odot}$ are core-forming in our simulation. Our study thus demonstrates how self-interactions diversify halo populations in an environmentally-dependent fashion within and surrounding MW-mass hosts, providing a compelling avenue to address the diverse dark matter distributions of observed dwarf galaxies. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.13768v1
New ASKAP Radio Supernova Remnants and Candidates in the Large Magellanic Cloud by Luke M. Bozzetto et al. on Monday 17 October We present a new Australian Square Kilometre Array Pathfinder (ASKAP) sample of 14 radio Supernova Remnant (SNR) candidates in the Large Magellanic Cloud (LMC). This new sample is a significant increase to the known number of older, larger and low surface brightness LMC SNRs. We employ a multi-frequency search for each object and found possible traces of optical and occasionally X-ray emission in several of these 14 SNR candidates. One of these 14 SNR candidates (MCSNR J0522-6543) has multi-frequency properties that strongly indicate a bona fide SNR. We also investigate a sample of 20 previously suggested LMC SNR candidates and confirm the SNR nature of MCSNR J0506-6815. We detect lower surface brightness SNR candidates which were likely formed by a combination of shock waves and strong stellar winds from massive progenitors (and possibly surrounding OB stars). Some of our new SNR candidates are also found in a lower density environments in which SNe type Ia explode inside a previously excavated interstellar medium (ISM). arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.05090v2
New ASKAP Radio Supernova Remnants and Candidates in the Large Magellanic Cloud by Luke M. Bozzetto et al. on Tuesday 11 October We present a new Australian Square Kilometre Array Pathfinder (ASKAP) sample of 14 radio Supernova Remnant (SNR) candidates in the Large Magellanic Cloud (LMC). This new sample is a significant increase to the known number of older, larger and low surface brightness LMC SNRs. We employ a multi-frequency search for each object and found possible traces of optical and occasionally X-ray emission in several of these 14 SNR candidates. One of these 14 SNR candidates (MCSNR J0522-6543) has multi-frequency properties that strongly indicate a bona fide SNR. We also investigate a sample of 20 previously suggested LMC SNR candidates and confirm the SNR nature of MCSNR J0506-6815. We detect lower surface brightness SNR candidates which were likely formed by a combination of shock waves and strong stellar winds from massive progenitors (and possibly surrounding OB stars). Some of our new SNR candidates are also found in a lower density environments in which SNe type Ia explode inside a previously excavated interstellar medium (ISM). arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.05090v1
Properties of luminous red supergiant stars in the Magellanic Clouds by S. de Wit et al. on Sunday 25 September There is evidence that some red supergiants (RSGs) experience short lived phases of extreme mass loss, producing copious amounts of dust. These episodic outburst phases help to strip the hydrogen envelope of evolved massive stars, drastically affecting their evolution. However, to date, the observational data of episodic mass loss is limited. This paper aims to derive surface properties of a spectroscopic sample of fourteen dusty sources in the Magellanic Clouds using the Baade telescope. These properties may be used for future spectral energy distribution fitting studies to measure the mass loss rates from present circumstellar dust expelled from the star through outbursts. We apply MARCS models to obtain the effective temperature ($T_{rm eff}$) and extinction ($A_V$) from the optical TiO bands. We use a $chi^2$ routine to determine the best fit model to the obtained spectra. We compute the $T_{rm eff}$ using empirical photometric relations and compare this to our modelled $T_{rm eff}$. We have identified a new yellow supergiant and spectroscopically confirmed eight new RSGs and one bright giant in the Magellanic Clouds. Additionally, we observed a supergiant B[e] star and found that the spectral type has changed compared to previous classifications, confirming that the spectral type is variable over decades. For the RSGs, we obtained the surface and global properties, as well as the extinction $A_V$. Our method has picked up eight new, luminous RSGs. Despite selecting dusty RSGs, we find values for $A_V$ that are not as high as expected given the circumstellar extinction of these evolved stars. The most remarkable object from the sample, LMC3, is an extremely massive and luminous evolved massive star and may be grouped amongst the largest and most luminous RSGs known in the Large Magellanic Cloud (log(L$_*$/L$_{odot})sim$5.5 and $R = 1400 , textrm R_{odot}$). arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.11239v1
Period Change Rates of Large Magellanic Cloud Cepheids using MESA by F. Espinoza-Arancibia et al. on Thursday 22 September Pulsating stars, such as Cepheids and RR Lyrae, offer us a window to measure and study changes due to stellar evolution. In this work, we study the former by calculating a set of evolutionary tracks of stars with an initial mass of 4 to 7 $M_odot$, varying the initial rotation rate and metallicity, using the stellar evolution code Modules for Experiments in Stellar Astrophysics (MESA). Using Radial Stellar Pulsations (RSP), a recently added functionality of MESA, we obtained theoretical instability strip (IS) edges and linear periods for the radial fundamental mode. Period-age, period-age-temperature, period-luminosity, and period-luminosity-temperature relationships were derived for three rotation rates and metallicities, showing a dependence on crossing number, position in the IS, rotation, and metallicity. We calculated period change rates (PCRs) based on the linear periods from RSP. We compared our models with literature results using the Geneva code, and found large differences, as expected due to the different implementations of rotation between codes. In addition, we compared our theoretical PCRs with those measured in our recent work for Large Magellanic Cloud Cepheids. We found good overall agreement, even though our models do not reach the short-period regime exhibited by the empirical data. Implementations of physical processes not yet included in our models, such as pulsation-driven mass loss, an improved treatment of convection that may lead to a better description of the instability strip edges, as well as consideration of a wider initial mass range, could all help improve the agreement with the observed PCRs. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.10609v1
Multiwavelength modeling the SED of Luminous Supersoft X-ray Sources in Large Magellanic Cloud and Small Magellanic Cloud by Augustin Skopal. on Wednesday 07 September Classical supersoft X-ray sources (SSSs) are understood as close binary systems in which a massive white dwarf (WD) accretes from its companion at rates sustaining steady hydrogen burning on its surface generating bolometric luminosities of $10^{36}-2times10^{38}$ erg/s. Here, we perform for the first time the global supersoft X-rays to near-infrared (NIR) spectral energy distribution (SED) for the brightest SSSs in LMC and SMC. We test a model in which the ultraviolet--NIR is dominated by the emission from a compact (unresolved) circumstellar nebula represented by the ionized gas out-flowing from the SSS. The SED models correspond to luminosities of SSSs a few times $10^{38}-10^{39}$ erg/s, radiating at blackbody temperatures of $approx 3times 10^{5}$ K, and indicate nebular continuum, whose emission measure of $gtrsim 2times10^{60}$ cm$^{-3}$ corresponds to a wind mass-loss at rates $gtrsim 2times 10^{-6}$ $M_{odot},{rm yr}^{-1}$. Such extreme parameters suggest that the brightest SSSs could be unidentified optical novae in a post-nova SSS state sustained at a high long-lasting luminosity by resumed accretion, possibly at super-Eddington rates. New observations and theoretical multiwavelength modeling of the global SED of SSSs are needed to reliably determine their parameters, and thus understand their proper stage in stellar evolution. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.02524v1
Symphony: Cosmological Zoom-in Simulation Suites over Four Decades of Host Halo Mass by Ethan O. Nadler et al. on Wednesday 07 September We present Symphony, a compilation of $262$ cosmological, cold dark matter-only zoom-in simulations spanning four decades of host halo mass, from $10^{11}~M_{mathrm{odot}}$ to $10^{15}~M_{mathrm{odot}}$. This compilation includes three existing simulation suites at the cluster and Milky Way-mass scales, and two new suites: $39$ Large Magellanic Cloud-mass ($10^{11}~M_{mathrm{odot}}$) and $49$ strong-lens-analog ($10^{13}~M_{mathrm{odot}}$) group-mass hosts. Across the entire host halo mass range, the highest-resolution regions in these simulations are resolved with a dark matter particle mass of $approx 3times 10^{-7}$ times the host virial mass and a Plummer-equivalent gravitational softening length of $approx 9times 10^{-4}$ times the host virial radius, on average. We measure correlations between subhalo abundance and host concentration, formation time, and maximum subhalo mass, all of which peak at the Milky Way host halo mass scale. Subhalo abundances are $approx 50%$ higher in clusters than in lower-mass hosts at fixed sub-to-host halo mass ratios. Subhalo radial distributions are approximately self-similar as a function of host mass and are less concentrated than hosts' underlying dark matter distributions. We compare our results to the semi-analytic model $mathrm{texttt{Galacticus}}$, which predicts subhalo mass functions with a higher normalization at the low-mass end and radial distributions that are slightly more concentrated than Symphony. We use $mathrm{texttt{UniverseMachine}}$ to model halo and subhalo star formation histories in Symphony, and we demonstrate that these predictions resolve the formation histories of the halos that host nearly all currently observable satellite galaxies in the Universe. To promote open use of Symphony, data products are publicly available at http://phil-mansfield.github.io/symphony. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.02675v1
Symphony: Cosmological Zoom-in Simulation Suites over Four Decades of Host Halo Mass by Ethan O. Nadler et al. on Wednesday 07 September We present Symphony, a compilation of $262$ cosmological, cold dark matter-only zoom-in simulations spanning four decades of host halo mass, from $10^{11}~M_{mathrm{odot}}$ to $10^{15}~M_{mathrm{odot}}$. This compilation includes three existing simulation suites at the cluster and Milky Way-mass scales, and two new suites: $39$ Large Magellanic Cloud-mass ($10^{11}~M_{mathrm{odot}}$) and $49$ strong-lens-analog ($10^{13}~M_{mathrm{odot}}$) group-mass hosts. Across the entire host halo mass range, the highest-resolution regions in these simulations are resolved with a dark matter particle mass of $approx 3times 10^{-7}$ times the host virial mass and a Plummer-equivalent gravitational softening length of $approx 9times 10^{-4}$ times the host virial radius, on average. We measure correlations between subhalo abundance and host concentration, formation time, and maximum subhalo mass, all of which peak at the Milky Way host halo mass scale. Subhalo abundances are $approx 50%$ higher in clusters than in lower-mass hosts at fixed sub-to-host halo mass ratios. Subhalo radial distributions are approximately self-similar as a function of host mass and are less concentrated than hosts' underlying dark matter distributions. We compare our results to the semi-analytic model $mathrm{texttt{Galacticus}}$, which predicts subhalo mass functions with a higher normalization at the low-mass end and radial distributions that are slightly more concentrated than Symphony. We use $mathrm{texttt{UniverseMachine}}$ to model halo and subhalo star formation histories in Symphony, and we demonstrate that these predictions resolve the formation histories of the halos that host nearly all currently observable satellite galaxies in the Universe. To promote open use of Symphony, data products are publicly available at http://phil-mansfield.github.io/symphony. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.02675v1
Multiwavelength modeling the SED of Luminous Supersoft X-ray Sources in Large Magellanic Cloud and Small Magellanic Cloud by Augustin Skopal. on Wednesday 07 September Classical supersoft X-ray sources (SSSs) are understood as close binary systems in which a massive white dwarf (WD) accretes from its companion at rates sustaining steady hydrogen burning on its surface generating bolometric luminosities of $10^{36}-2times10^{38}$ erg/s. Here, we perform for the first time the global supersoft X-rays to near-infrared (NIR) spectral energy distribution (SED) for the brightest SSSs in LMC and SMC. We test a model in which the ultraviolet--NIR is dominated by the emission from a compact (unresolved) circumstellar nebula represented by the ionized gas out-flowing from the SSS. The SED models correspond to luminosities of SSSs a few times $10^{38}-10^{39}$ erg/s, radiating at blackbody temperatures of $approx 3times 10^{5}$ K, and indicate nebular continuum, whose emission measure of $gtrsim 2times10^{60}$ cm$^{-3}$ corresponds to a wind mass-loss at rates $gtrsim 2times 10^{-6}$ $M_{odot},{rm yr}^{-1}$. Such extreme parameters suggest that the brightest SSSs could be unidentified optical novae in a post-nova SSS state sustained at a high long-lasting luminosity by resumed accretion, possibly at super-Eddington rates. New observations and theoretical multiwavelength modeling of the global SED of SSSs are needed to reliably determine their parameters, and thus understand their proper stage in stellar evolution. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.02524v1
Researchers using the Chandra X-ray Observatory have found that a known pulsar is moving through a supernova remnant at over one million miles per hour. Plus, the life and death of stars, new pictures of the Large Magellanic Cloud, and all of the SpaceX rocket launches.
In a special, solo, edition of Talkin' Science Matt brings you the latest in the world of science and space. We've got everything covered in a bite sized podcast – from Russia's anti-satellite test that sent space debris flying to astronomers finding a baby black hole in the Large Magellanic Cloud to NASA delaying landing […] The post Russia Makes Space Debris; Astronomers Find A Baby Black Hole and Artemis Delayed appeared first on Trekzone.
SpaceTime with Stuart Gary | Astronomy, Space & Science News
The Astronomy, Technology, and Space Science News Podcast.SpaceTime Series 24 Episode 123*The Large Magellanic Cloud cannibalizing smaller galaxiesScientists have confirmed that the Large Magellanic Cloud has been cannibalizing smaller galaxies. Astronomers already knew that large galaxies like the Milky Way grow by merging with or cannibalizing smaller galaxies. But now a report in the journal Nature has shown that a small satellite dwarf galaxy like the Large Magellanic Cloud has in turn absorbed an even smaller galaxy in its vicinity.*NASA's first test of optical communications technologyNASA is about to test a new optical laser communications system in space for the first time. The Laser Communications Relay Demonstration is gearing up for launch next month with the payload now fully integrated into its host spacecraft and ready for its final testing before being lofted into orbit.*One Web's constellation passes the halfway markOne Web have launched another 36 broadband internet satellites into orbit.*The Science ReportDiscovery of the first fossil evidence of modern human remains from the Pleistocene in Sulawesi.The US State Department provides details on America's current nuclear weapons stockpile.A new study suggests horses were first domesticated in the Volga-Don region of Russia.Skeptic's guide to schadenfreude over COVID deniers who get sick.For more SpaceTime and show links: https://linktr.ee/biteszHQ If you love this podcast, please get someone else to listen too. Thank you…Your support is needed...SpaceTime is an independently produced podcast (we are not funded by any government grants, big organisations or companies), and we're working towards becoming a completely listener supported show...meaning we can do away with the commercials and sponsors. We figure the time can be much better spent on researching and producing stories for you, rather than having to chase sponsors to help us pay the bills.That's where you come in....help us reach our first 1,000 subscribers...at that level the show becomes financially viable and bills can be paid without us breaking into a sweat every month. Every little bit helps...even if you could contribute just $1 per month. It all adds up.By signing up and becoming a supporter at the $5 or more level, you get immediate access to over 240 commercial-free, double, and triple episode editions of SpaceTime plus extended interview bonus content. You also receive all new episodes on a Monday rather than having to wait the week out. Subscribe via Patreon or Supercast (you get a month's free trial with Supercast to see if it's really for you or not)....and share in the rewards. Details at Patreon www.patreon.com/spacetimewithstuartgary or Supercast - https://bitesznetwork.supercast.tech/ Details at https://spacetimewithstuartgary.com or www.bitesz.com Sponsor Details:This episode is brought to you with the support of NameCheap…cheap domain names is just the beginning of your own online presence. We use them and we love them. Get our special deal…just visit: https://spacetimewithstuartgary.com/namecheap and help support the show.For more SpaceTime visit https://spacetimewithstuartgary.com (mobile friendly). For enhanced Show Notes including photos to accompany this episode: https://www.bitesz.com/show/spacetime/blog/ RSS feed: https://www.spreaker.com/show/2458531/episodes/feed Email: mailto:SpaceTime@bitesz.comTo receive the Astronomy Daily Newsletter free, direct to your inbox...just join our mailing list at www.bitesz.com or visit https://www.bitesz.com/p/astronomy-daily/Help support SpaceTime: The SpaceTime with Stuart Gary merchandise shop. Get your T-Shirts, Coffee Cups, badges, tote bag + more and help support the show. Check out the range: http://www.cafepress.com/spacetime Thank you.
Photo: The Large Magellanic Cloud, a dwarf galaxy. At a distance of 163,000 light-years, it is the third-closest galaxy to the Milky Way. The Next 500 Years: Engineering Life to Reach New Worlds, by Christopher E. Mason | Apr 20, 2021 https://www.amazon.com/s?k=christopher+Mason&i=stripbooks&ref=nb_sb_noss_2 An argument that we have a moral duty to explore other planets and solar systems—because human life on Earth has an expiration date. Inevitably, life on Earth will come to an end, whether by climate disaster, cataclysmic war, or the death of the sun in a few billion years. To avoid extinction, we will have to find a new home planet, perhaps even a new solar system, to inhabit. In this provocative and fascinating book, Christopher Mason argues that we have a moral duty to do just that. As the only species aware that life on Earth has an expiration date, we have a responsibility to act as the shepherd of life-forms--not only for our species but for all species on which we depend and for those still to come (by accidental or designed evolution). Mason argues that the same capacity for ingenuity that has enabled us to build rockets and land on other planets can be applied to redesigning biology so that we can sustainably inhabit those planets. And he lays out a 500-year plan for undertaking the massively ambitious project of reengineering human genetics for life on other worlds. As they are today, our frail human bodies could never survive travel to another habitable planet. Mason describes the toll that long-term space travel took on astronaut Scott Kelly, who returned from a year on the International Space Station with changes to his blood, bones, and genes. Mason proposes a ten-phase, 500-year program that would engineer the genome so that humans can tolerate the extreme environments of outer space--with the ultimate goal of achieving human settlement of new solar systems. He lays out a roadmap of which solar systems to visit first, and merges biotechnology, philosophy, and genetics to offer an unparalleled vision of the universe to come. ..
Cosmic Cuts lives in the primordial soup of hip hop, boom bap, electronica, soul and Rnb. This episode features intensely personal and uplifting tracks brought to you by @djunjust and his journey towards self-actualization. artist - track the code - overthinking seba kaapstad - im scared vince staples - take me home ft foushee leon bridges - magnolias makzo - cocktail hour ft leavv, seb zillner lion babe - rainbows ft ghostface killah brittany howard - he loves me (9th wonder remix ft common) price - selfish ft bas & wyclef jean declaime x madlib - enuff submerse - flashback (ft. devin morrison, pink siifu) seba kaapstad - friday thats good kota the friend - hollywood sinead harnett - take me away (ft earthgang) sa-roc - the rebirth (ft MF DOOM) madison mcferrin - try (unjust extended edit) adekunle gold - sinner ft lucky daye noname - rainforest little simz - point and kill ft obongjayar little simz - fear no man little simz - rollin stone jid - never koffee - w ft gunna tobi & juls - dollas and cents cupidon x paul mond - masquenada fergalicious - cupidon remix radical one - beba (f r a n c h i s e edit) vinyl drops, quantic y anita tijoux - entre rejas the grand alliance - stranger thangs image credit: ESA/NASA/ & Danny LaCrue - The heart of the monstrous Tarantula Nebula, in the south-east corner of the Large Magellanic Cloud. It is the largest area of active star-formation in our local universe, being between 600-1,400 light-years in diameter.
We got the entire team together for the second time. We discussed joining the LaunchPadOne Self Made contest. (https://www.launchpaddm.com/selfmade) We also discussed Nick's possibly last photo-shoot with his long time photography associate. (https://www.instagram.com/nick_/) Kyler introduces Chroma, the first song release of Virtual Riot's new album: Simulation. (https://youtu.be/-PeWP7Czde8) and Trevor discusses the following article: Astronomers Create New Radio Map of Large Magellanic Cloud (http://www.sci-news.com/astronomy/radio-map-large-magellanic-cloud-09978.html) --- Send in a voice message: https://anchor.fm/alexander-hicken/message Support this podcast: https://anchor.fm/alexander-hicken/support
Author Jen Sincero explains why it’s important to form and maintain habits. You’ll also learn about why phantom limb sensations are way more common than you think; and how the Large Magellanic Cloud, or LMC, is warping the Milky Way galaxy. Additional resources from author Jen Sincero Pick up "Badass Habits: Cultivate the Awareness, Boundaries, and Daily Upgrades You Need to Make Them Stick" from Amazon: https://amzn.to/37l87kN Website: https://www.jensincero.com/ Twitter: https://twitter.com/jensincero Instagram: https://www.instagram.com/jensincero/ Youtube: https://www.youtube.com/user/TheJenSincero Phantom Limb Sensations Are Way More Common Than You Think by Ashley Hamer Ramachandran, V. (1998). The perception of phantom limbs. The D. O. Hebb lecture. Brain, 121(9), 1603–1630. https://doi.org/10.1093/brain/121.9.1603 Neurosci. (2016, March 11). Neuroscientifically Challenged. Neuroscientifically Challenged. https://www.neuroscientificallychallenged.com/blog/know-your-brain-primary-somatosensory-cortex Virtual reality eases phantom limb pain. (2017). ScienceDaily. https://www.sciencedaily.com/releases/2017/05/170531102921.htm Kumar, Kv., Suresh, B., Misri, Z., Chakrapani, M., Mohan, U., & babu, Sk. (2013). Effectiveness of mirror therapy on lower extremity motor recovery, balance and mobility in patients with acute stroke: A randomized sham-controlled pilot trial. Annals of Indian Academy of Neurology, 16(4), 634. https://doi.org/10.4103/0972-2327.120496 Cortical homunculus: A WHAT Lives Inside My Brain? (2009, March 18). NPR.org. https://www.npr.org/templates/story/story.php?storyId=101960403 The Milky Way once collided with the Large Magellanic Cloud by Grant Currin Galaxy encounter violently disturbed Milky Way, study finds. (2020). EurekAlert! https://www.eurekalert.org/pub_releases/2020-11/uoe-gev112320.php Petersen, M. S., & Peñarrubia, J. (2020). Detection of the Milky Way reflex motion due to the Large Magellanic Cloud infall. Nature Astronomy. https://doi.org/10.1038/s41550-020-01254-3 Ravilious, K. (2015). Earth was a frozen Snowball when animals first evolved. BBC.com. http://www.bbc.com/earth/story/20150112-did-snowball-earth-make-animals Subscribe to Curiosity Daily to learn something new every day with Cody Gough and Ashley Hamer. You can also listen to our podcast as part of your Alexa Flash Briefing; Amazon smart speakers users, click/tap “enable” here: https://www.amazon.com/Curiosity-com-Curiosity-Daily-from/dp/B07CP17DJY See omnystudio.com/listener for privacy information.
SpaceTime with Stuart Gary | Astronomy, Space & Science News
The Astronomy, Technology and Space Science News Podcast.SpaceTime with Stuart Gary Series 23 Episode 130*The Large Magellanic Cloud’s violent encounter with the Milky WayA new study has found that a neighbouring galaxy called the Large Magellanic Cloud is twisting and deforming the disk of the Milky Way Galaxy.*Washington launches a new top secret spy satelliteThe United launch Alliance has successfully launched an Atlas V rocket carrying the highly secretive National Reconnaissance Office NROL-101 mission into orbit.*December SkywatchThe December solstice, the Geminids meteor shower, and the ticking time bomb known as Eta Carinae, are among the highlights of December skywatch. Show Your Support For SpaceTimeGet immediate access to over 200 commercial-free, double and triple episode editions of SpaceTime plus extended interview bonus content. Subscribe via Patreon or Supercast....and share in the rewards. Details at www.patreon.com/spacetimewithstuartgary or Supercast - https://bitesznetwork.supercast.tech/Sponsor Details:This episode of SpaceTime is brought to with the support of ExpressVPN...Rated No.1 by TechRadar...and as used by us. For three months free when you sign up for any 12-month package just visit www.tryexpressvpn.com/space and help support the show.The Great Courses Plus...lifelong learning from the best in their fields. For your 14 day free trial of the entire library, please visit www.thegreatcoursesplus.com/space and help support the show. LastPass password manager….it’s one we use and is a lifesaver. Check it out for free at spacetimewithstuartgary.com/lastpass and help support the show.NameCheap.com….your online presence begins with a great domain name. Find your perfect one with NameCheaps powerful tools. Visit spacetimewithstuartgary.com/namecheap for more details and help support the show.For more SpaceTime visit https://spacetimewithstuartgary.com (mobile friendly). For enhanced Show Notes including photos to accompany this episode, visit: http://www.bitesz.com/spacetimewithstuartgaryRSS feed: https://rss.acast.com/spacetime Email: SpaceTime@bitesz.comTo receive the Astronomy Daily Newsletter free, direct to your inbox...just join our mailing list at www.bitesz.com/mailinglist or visit https://www.bitesz.com/astronomy-daily Support this show http://supporter.acast.com/spacetime. See acast.com/privacy for privacy and opt-out information.
In 1987 a massive supernova erupted in the Large Magellanic Cloud.. now, it seems to have left behind a neutron star. The post Bursting into the Universe appeared first on Trekzone.
ESO’s VISTA telescope has been surveying our neighbouring galaxy, the Large Magellanic Cloud for about a decade. The observations revealed in unprecedented detail the properties of 10 million stars in the galaxy. As a result, astronomers have got new opportunities to study stellar evolution, galactic dynamics, and variable stars.
ESO’s VISTA telescope has been surveying our neighbouring galaxy, the Large Magellanic Cloud for about a decade. The observations revealed in unprecedented detail the properties of 10 million stars in the galaxy. As a result, astronomers have got new opportunities to study stellar evolution, galactic dynamics, and variable stars.
John Derby and Travis Spencer discuss the inevitable collision between the the Large Magellanic Cloud and the Milky Way! Then, at 15:28, they discuss news stories including an Iowa mayor getting busted with a ton of pot, Amazon vests for robots to see workers, unicorn armpit hair, a man injects semen into his arm and Larry Fitzgerald plays golf with the President. At 44:53, Jesse McIntosh, can't suspend his disbelief of one thing...the Flintstones. At 46:22, your Facebook World News Update. At 47:19, the robots have become sentient, and phone scams are their chosen route to power. At 50:45. Deb Loftis goes to Helsinki for Santa and snowmobiling! Finally, at 55:19, Bill Ryan returns to tell a story about hanging with Phil Collins' wife and Roger Waters during the LA riots. #HotCarlSagan
Hi, this is Mark Rushton of markrushton.com - thanks for listening to my podcast of original or live ambient and electronic music and field recordings. This is Podcast #143 produced on Sunday, November 18 of 2018. *** As of November 3rd, 2018, I am affiliated with and have paintings at the Leopold Gallery in Kansas City, in the Brookside neighborhood, at 324 W 63rd St. If you're in the Kansas City area, stop by and have a look. My paintings are available for viewing at their web site: leopoldgallery.com That's leopoldgallery.com Link is in the description. Leopold Gallery is also coordinating any private commissions. While that's big news, you're listening to this podcast because of the ambient sounds. Along those lines, I've been releasing new tracks every couple of weeks. If you follow me on Spotify and listen to the weekly Spotify Release Radar playlist, you've probably noticed this. Following me on Spotify is the easiest way to find out about new tracks. Eventually, after I've released 7 or 8 singles, these tracks will be compiled and released as an album. For the foreseeable future, this is how I plan to release new music: a new single track every couple of weeks with an album every 3 to 4 months. Right now, in this podcast, I'll play portions of those singles. First up is a snippet from "Refactoring Rainy Dreams", then part of "Starwaves", followed by a section of "Radio Transmission From the Large Magellanic Cloud, then "Docking in Outer Space", and finally a portion of my forthcoming single, to be released on November 22nd, "Deep Hover". Thanks for listening. I'll be back soon with another podcast. *** Web site and Mailing list: http://www.markrushton.com/ Leopold Gallery: http://www.leopoldgallery.com Follow me at Spotify: https://open.spotify.com/artist/3o7In5aHAnzK7WYGHY5Khx?si=bi1hTnPKRK2uZ7iolBTZzw Buy downloads at Bandcamp: https://markrushton.bandcamp.com/ Buy compact discs: http://markrushton.com/music/buy-compact-discs/ * This podcast is hosted by Libsyn at: http://ambient.libsyn.com Podcast RSS feed is http://ambient.libsyn.com/rss
Hi, this is Mark Rushton of markrushton.com - thanks for listening to my podcast of original or live ambient and electronic music and field recordings. This is Podcast #143 produced on Sunday, November 18 of 2018. *** As of November 3rd, 2018, I am affiliated with and have paintings at the Leopold Gallery in Kansas City, in the Brookside neighborhood, at 324 W 63rd St. If you're in the Kansas City area, stop by and have a look. My paintings are available for viewing at their web site: leopoldgallery.com That's leopoldgallery.com Link is in the description. Leopold Gallery is also coordinating any private commissions. While that's big news, you're listening to this podcast because of the ambient sounds. Along those lines, I've been releasing new tracks every couple of weeks. If you follow me on Spotify and listen to the weekly Spotify Release Radar playlist, you've probably noticed this. Following me on Spotify is the easiest way to find out about new tracks. Eventually, after I've released 7 or 8 singles, these tracks will be compiled and released as an album. For the foreseeable future, this is how I plan to release new music: a new single track every couple of weeks with an album every 3 to 4 months. Right now, in this podcast, I'll play portions of those singles. First up is a snippet from "Refactoring Rainy Dreams", then part of "Starwaves", followed by a section of "Radio Transmission From the Large Magellanic Cloud, then "Docking in Outer Space", and finally a portion of my forthcoming single, to be released on November 22nd, "Deep Hover". Thanks for listening. I'll be back soon with another podcast. *** Web site and Mailing list: http://www.markrushton.com/ Leopold Gallery: http://www.leopoldgallery.com Follow me at Spotify: https://open.spotify.com/artist/3o7In5aHAnzK7WYGHY5Khx?si=bi1hTnPKRK2uZ7iolBTZzw Buy downloads at Bandcamp: https://markrushton.bandcamp.com/ Buy compact discs: http://markrushton.com/music/buy-compact-discs/ * This podcast is hosted by Libsyn at: http://ambient.libsyn.com Podcast RSS feed is http://ambient.libsyn.com/rss
NASA's flying observatory will begin its winter missions from Christchurch today.Sofia is a former Boeing Passenger plane decked out with a giant telescope - and manned by scientists, astronomers, mechanics and technicians.It's been visiting Christchurch for the past five years.Deployment Manager Ed Harmon told Chris Lynch they'll head out around 8 o'clock tonight and be back around 4am for the first trip of their seven week programme.This time around they're looking at our neighbouring galaxy The Large Magellanic Cloud, the centre of our own Milky Way galaxy, and Saturn's moon.
SpaceTime with Stuart Gary | Astronomy, Space & Science News
Thank you to our growing Patreon group. Your support is very much appreciated…and welcome to the team. You can help support SpaceTime, by becoming a patron...and we have rewards for you. Do your bit to keep Stuart fed and housed... details at our Patreon page... https://www.patreon.com/spacetimewithstuartgary *Fastest stars in the galaxy are all aliens A new study has concluded that fast moving stars in our galaxy were originally alien stars from other galaxies which were cannibalised by the Milky Way. The new study claims a large population of very fast moving stars in the Milky Way, originally started out in the neighbouring satellite galaxy the Large Magellanic Cloud. *Why quasars suddenly twinkle violently Gas filaments surrounding stars like the strands of a pompom appear to be causing quasars to suddenly begin to violently twinkle. The findings reported in the Astrophysical Journal could finally provide scientists answer for the 30 year old mystery. *China’s new super rocket the Long March 5 experiences a major crash and burn The launch of one of China’s most powerful rocket’s the Long March 5 has ended in failure with the launch vehicle experiencing what Chinese media would only describe as an anomaly about six minutes into the flight. The mission – which launched from the Wenchang Space Centre on Hainan Island off the southern coast of China -- was the second only orbital flight for the new launch vehicle -- which was to be a showcase for Beijing’s growing space ambitions. *Seventh Arianespace launch of the year Arianespace has successfully undertaken its seventh launch this year. The Ariane 5 carried two telecommunications satellites into orbit from the European Space Agency’s Kourou space port in French Guiana. *Dragon returns The SpaceX Dragon CRS 11 capsule has splashed down successfully in the North Pacific Ocean following a month long stay docked to the International Space Station. It was the first time a previously used Dragon capsule had undertaken a second mission – an achievement which will dramatically improve the economics of commercial spaceflight. *Why humans are hard wired to see the haunting face on Mars The now famous Face on Mars is one the most iconic images ever taken of the surface of the red planet. It’s now well understood to be nothing more than the result of the interplay of lights and shadows on an eroded hill. But the science behind why people see it as a humanoid face is fascinating. The video for the Ariane 5 launch is at: https://www.youtube.com/watch?v=eiwuB0YSN0k The video for Dragon return is at: https://www.youtube.com/watch?v=aUvUomjB5Xo Join our mailing list at http://www.bitesz.com/join-our-mailing-list #astronomy #space #science #technology #news #astrophysics #NASA Learn more about your ad choices. Visit megaphone.fm/adchoices Support this show http://supporter.acast.com/spacetime. See acast.com/privacy for privacy and opt-out information.
Thirty years ago on February 24, 1987, observers in the southern hemisphere noticed a new object in the Large Magellanic Cloud.
This title was released in January 2017. It will be exclusively available to buy from the BF website until February 28th 2017, and on general sale after this date. Astronomical navigation is a tricky business. To help Adric with his studies, the Doctor sets course for Gallius Ultima – a planet on the edge of the Milky Way, housing one of the most impressive observatories ever constructed. But the TARDIS arrives to find Gallius U in a state of emergency, tracking the return of the Explorer-class ship Johannes Kepler from its mission into the heart of the mysterious Large Magellanic Cloud. A mission that met with disaster… To find out what overtook the crew of the Johannes Kepler, the Doctor and his companions must journey into the heart of the Cloud… and beyond, into the darkness of another reality altogether. The universe of the Star Men. Written By: Andrew Smith Directed By: Barnaby Edwards Cast Peter Davison (The Doctor), Matthew Waterhouse (Adric), Sarah Sutton (Nyssa), Janet Fielding (Tegan), Sue Holderness (Kala Tace), Sophie Wu (Autumn Tace), Peter Guinness (Rovus), Damian Lynch (Fell/Lom), Kris Dyer (Nomar/Vedrin / Surgical Robot/ Pilot), Barnaby Edwards (Computer). Other parts played by members of the cast. Producer David Richardson Script Editor Alan Barnes
Astrophiz 22 is out now on Soundcloud or subscribe in iTunes Part II: The Parkes ‘Dish’ interrogates pulsars to expose gravity waves. We interview Operations Scientist John Sarkissian at the CSIRO Parkes Radio Observatory. He explains how the ‘Spider Dipoles’ that make up the Murchison Widefield Array in remote Western Australia contribute to SKA, how Parkes chase down gravity waves and has detected most of the world’s FRBs (fast radio bursts of unknown origin), after being distracted by ‘perytons’ and microwave ovens. And yes, ‘The Dish’ is searching for Extraterrestrial Intelligence in the international SETI ‘Breakthrough Listen’ project. We’re not saying they’re searching for Aliens ….. but Aliens! Dr Nadezhda in Part I of Stellar Evolution explains how the mass of a star determines its evolutionary path, and next week we will look at the Hetsprung-Russell Diagram “What”s Up in the Sky this Week” for Northern Hemisphere observers and astrophotographers, and for Southern Hemisphere Listeners, December is the best time to see the Large Magellanic Cloud and the Small Magellanic Cloud. We also expose Procyon and curse the moon for demolishing the Geminids Meteor Shower In the News: 1. The Spiderweb galaxy 2. Imaging a Black Hole Event Horizon 3. ICRAR tells us the Universe is slowly becoming less energetic (Well, who isn’t ;)
Astronomers employ a new technique to answer a century old question
Transcript: The Small Magellanic Cloud is sixty-three kiloparsecs away and about eight kiloparsecs across. It’s an irregular galaxy with a bar-like configuration of blue stars, most of which are a few billion years old. The Small Magellanic Cloud is connected to the Large Magellanic Cloud by a bridge of cold, diffuse hydrogen gas, originally detected by radio astronomers, called the Magellanic Stream. This extends from the Small Magellanic Cloud in an arc that loops behind the south galactic pole and in the other direction reaches down into the plane of the Milky Way. Both Magellanic Clouds are gravitationally bound to the Milky Way, and their orbits take them through the disk of the galaxy. So the Magellanic Stream is a trail of gas drawn out during such a passage about five hundred million years ago.
Transcript: When Magellan traveled round the world in the early sixteenth century, there was no bright star near the southern celestial pole, so for navigation he used two glowing patches of light which became known the Magellanic Clouds. But of course, they must have been known throughout prehistory and were undoubtedly the subject of myth and legend. They’re companions to the Milky Way galaxies, and they are extremely important in astronomy because their stellar nurseries are close enough to get a detailed view and identify individual examples of rare stellar populations such as RR Lyraes, Cepheids, novae, planetary nebulae, and more exotic variable stars.
Transcript: On February 23, 1987, Oscar du Halde stepped outside his telescope to check the sky conditions at the Las Companas Observatory in Chile. He saw a new star near 30 Doradus nebula in the Large Magellanic Cloud, a small galaxy near the Milky Way. Homo sapiens were just developing on the plains of Africa a hundred and seventy thousand years ago when the blast wave from a dying star started out. The star was a blue super giant, twenty times the mass of the Sun, and as it exploded its iron plasma core collapsed from the size of Mars down to a size of about a hundred kilometers. The temperature exceeded 30 billion Kelvin, and the iron nuclei fragmented, and the explosion released a blast of neutrinos. A hundred and seventy thousand years passed; neutrinos and light traveled through space. The neutrinos arrived first, 10 billion passing through the body of every person on Earth. Delicate sensors detected the neutrinos in Japan and the United States. The light arrived a few hours later, and telescopes on Earth, on the Mir space station, and on satellite observatories focused their eyes on the dying star.
This beautiful image shows N49, which is the aftermath of a supernova explosion in the Large Magellanic Cloud.
The Large Magellanic Cloud, a dwarf galaxy that orbits the Milky Way, is revealed in exquisite detail in this video from the Spitzer Space Telescope.
The Large Magellanic Cloud, a dwarf galaxy that orbits the Milky Way, is revealed in exquisite detail in this video from the Spitzer Space Telescope.
The Large Magellanic Cloud, a dwarf galaxy that orbits the Milky Way, is revealed in exquisite detail in this video from the Spitzer Space Telescope.
The Large Magellanic Cloud, a dwarf galaxy that orbits the Milky Way, is revealed in exquisite detail in this video from the Spitzer Space Telescope.
The Large Magellanic Cloud, a dwarf galaxy that orbits the Milky Way, is revealed in exquisite detail in this video from the Spitzer Space Telescope.
The Large Magellanic Cloud, a dwarf galaxy that orbits the Milky Way, is revealed in exquisite detail in this video from the Spitzer Space Telescope.
The Large Magellanic Cloud, a dwarf galaxy that orbits the Milky Way, is revealed in exquisite detail in this video from the Spitzer Space Telescope.
Fakultät für Physik - Digitale Hochschulschriften der LMU - Teil 02/05
The aim of this thesis is to assess the effect of the metallicity on the Cepheid Period-Luminosity (PL) relation. The novelty of the approach adopted in this project consists in the homogeneous analysis of a large sample of Cepheids (72) observed in three galaxies (the Milky Way, the Large Magellanic Cloud and the Small Magellanic Cloud), spanning a factor of ten in metallicity. This allows us to explore the effect of the metallicity on the PL relation in a wide range and to study the gas enrichment histories of three different galaxies. To fulfil this goal, firstly, we have selected a sample of Cepheids for which distances and accurate photometry are available in the literature and we have collected high-resolution, high signal-to-noise spectra of these stars, using the highly advanced facilities of the European Southern Observatory in Chile. Secondly, we have directly measured iron and alpha-elements (O, Na, Mg, Al, Si, Ca, Ti) abundances of our sample from these spectra. We have compared our iron abundances with studies on Galactic and Magellanic Cepheids and found a good agreement for the average values and for the individual stars in common. We have then made a broader comparison with results for the Magellanic Clouds from the analysis of F and K non-variable supergiants (they have ages and temperatures similar to Cepheid stars) and of B stars, which are progenitors of Cepheids, and found a good agreement. Cepheids do not show any peculiar differences with these two other population of stars, this indicate that, during this evolutionary stage, there are no changes of the original iron content of the gas from which they were formed. We have then studied the trends of the individual alpha-elements abundance ratios relative to iron as a function of the iron content of our programme star. We can draw some preliminary conclusion considering oxygen, silicon and calcium as the most reliable indicators among the alpha-elements we have analysed. The trends of the abundance ratios of O, Si and Ca are in fairly good agreement with observational studies on Cepheids and on different kinds of stellar populations in the Galaxy and the Magellanic Clouds. The elemental abundances we have determined were used to investigate the effect of metallicity on the PL relation in the V and K bands, in order to check if there is a change of the effect as wavelength increases. We note different behaviours in the two bands. The metallicity has an effect in the V band in the sense that metal-rich Cepheids are fainter than metal-poor ones, while it does not have any effects in the K band. Thus, to safely measure the distances of galaxies, one can use the PL relation in the infrared bands (namely K), so as to minimise the effect of the metallicity. Using the K band has the additional advantage of reducing the effects of the interstellar extinction to the level of other systematic and random errors.
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