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SpaceTime with Stuart Gary | Astronomy, Space & Science News
SpaceTime Series 28 Episode 27The Astronomy, Space and Science News PodcastAsteroid 2024 YR4 Impact Risk Reduced, Insights into Mars' Core, and NASA's Lunar Mission UpdateIn this episode of SpaceTime, we bring you encouraging news about asteroid 2024 YR4, with new observations indicating that the chances of it impacting Earth have plummeted to just 0.001%. Initially flagged as a potential threat, this asteroid has been closely monitored, and the latest data from the Very Large Telescope has allowed astronomers to refine its orbit and rule out any collision risk for 2032.Exploring the Martian CoreWe also delve into a fascinating new study regarding the composition of Mars' core. Research suggests that while it may contain a liquid outer core, there could also be a solid inner core composed of iron and sulfur. This breakthrough could reshape our understanding of the Red Planet's geophysical properties and the role of lighter elements in its core.NASA's Latest Lunar MissionAdditionally, we provide an update on NASA's latest lunar mission, which has successfully launched and is heading towards the Moon's south pole. The mission features the Intuitive Machines IM2 spacecraft, equipped with the Athena lunar lander and the Lunar Trailblazer orbiter, both designed to conduct groundbreaking research and resource utilization studies on the lunar surface.00:00 Space Time Series 28 Episode 27 for broadcast on 3 March 202500:49 Update on asteroid 2024 YR4 impact probability06:30 Importance of new observations from the Very Large Telescope12:15 Insights into the Martian core composition18:00 Research on solid inner core possibilities22:45 Overview of NASA's lunar IM2 mission27:00 Archaeological discovery of an ancient Egyptian pharaoh's tomb30:15 Discussion on the cultural significance of the Skinwalker Ranch serieswww.spacetimewithstuartgary.comwww.bitesz.com
Just two weeks ago the world learned of an asteroid that had an almost 3 percent chance of striking earth in less than a decade. Astronomers kept looking, and a team including Olivier Hainaut at ESO's Very Large Telescope at Palanar, in Chile, have managed to narrow down the uncertainty such that we now know it will definitely not hit the earth. The secret of making such observations after most telescopes could no longer see it was down to the exceptionally dark skies there. But these may be under threat. A plan has been made to build a large power plant, including sustainable hydrogen production around 11km away from the otherwise isolated site, and astronomers around the world are rallying to call for the plant to be built further away so that its construction will not spoil the otherwise unique observation conditions. One of the signatories of a petition to that effect is Julia Siedel, also of ESO, who just last week published the first 3D atmospheric analysis of an exoplanet's climate. As she explains, future similar observations using the forthcoming, co-sited Extremely Large Telescope could be thwarted before the telescope is even finished.Back on earth, the Atlantic Meridional Overturning Current (AMOC) continues to bring warmer air and nutrients north towards the Arctic, and colder, denser water south in the global ocean overturn. But are reports of its collapse under climate change justified? A new paper this week suggests that for the next century at least it is stable though it might slow down. Jonathan Baker of the UK Met office explains how the winds in the south mean the cycle will keep turning, though it may slow down.Talking of the Arctic, Yoel Fink of MIT has dressed a couple of royal marines in wearable computer fibres for their current icy patrol in the north of Canada. Far from going commando, their underwear is measuring temperature and calorific burn to help them avoid frostbite and the dangers of the extreme environment. Yoel's paper this week describes the new device and the principle that in the future much of all of our healthcare will be provided by these sorts of wearable, stretchy, computing textiles monitoring our activities.Presenter: Roland Pease Producer: Alex Mansfield Production Coordinator: Jana Bennett-Holesworth and Josie Hardy(Image: Celestial conjunction at Paranal. Credit: ESO/Y.Beletsky)
Asteroide 2024 YR4 podría impactar la Tierra en 2032, generando atención global y medidas de defensaPor Félix Riaño @LocutorCo El asteroide 2024 YR4 ha encendido una señal de alerta en agencias espaciales y medios especializados. Se estima que pase cerca de la Tierra el 22 de diciembre de 2032. Dicen que mide entre 40 y 90 metros, lo suficiente para causar daños considerables. Los cálculos actuales ofrecen un 1,3% de probabilidad de impacto. Expertos de la NASA y la ESA van a continuar haciendo observaciones hasta abril de 2025. ¿Te parece sorprendente que un objeto tan pequeño pueda captar tanta atención? La verdad es que, si ocurriera un impacto, sería un evento peligroso. ¿Estaremos preparados para un escenario de defensa planetaria? Observatorios globales siguen cada movimiento con mucha cautela. Algunos creen que la amenaza es exagerada, pero existe incertidumbre El asteroide 2024 YR4 fue detectado el 27 de diciembre de 2024 por el sistema ATLAS en Chile, financiado por la NASA. Su tamaño estimado está entre 40 y 90 metros. Los expertos explican que este objeto viaja en una órbita elongada alrededor del Sol y posee un 1,3% de probabilidad de impactar contra la Tierra el 22 de diciembre de 2032. Hasta entonces, la comunidad científica va a realizar observaciones adicionales. El asteroide se va a observar hasta abril de 2025 y, después, se podría ver en 2028. Esa ventana va a ayudar a refinar su trayectoria con precisión. El riesgo principal radica en que no se puede descartar un impacto. El asteroide presenta un corredor de posible caída que abarca el Pacífico oriental, Sudamérica septentrional, el Atlántico, África, el mar Arábigo y el sur de Asia. Una roca de 40 a 90 metros podría producir una onda explosiva con efectos graves en zonas densamente pobladas. Expertos temen que, si aumenta la probabilidad, la reacción mundial deba coordinarse rápido. La comunidad científica busca más observaciones para reducir incertidumbres. Mientras tanto, cada informe genera preocupación, porque un error de cálculo traería consecuencias lamentables. Los gobiernos vigilan la información enviada por la Red Internacional de Alerta de Asteroides, temiendo un escenario complicado. Nadie quiere enfrentar un suceso al impacto de Tunguska. A nivel global, las agencias espaciales activaron la Red Internacional de Alerta de Asteroides (IAWN) y el Grupo Asesor de Planificación de Misiones Espaciales (SMPAG). Estas organizaciones van a evaluar posibles misiones, incluyendo desvíos con naves similares a la estrategia de la misión DART probada por la NASA en 2022. La Agencia Espacial Europea (ESA) mantiene la vigilancia activa y coordina observaciones con telescopios potentes, como el Very Large Telescope en Chile. La idea es obtener datos más precisos sobre la trayectoria del asteroide y definir si hay necesidad de un plan de contingencia. Cada país involucrado está recibiendo informes actualizados, y se contemplan simulacros de respuesta de emergencia. Casos previos, como el asteroide Apophis, dejaron lecciones valiosas de cooperación científica. La esperanza es que, para finales de 2025, las mediciones reduzcan la incertidumbre. De ocurrir un impacto, se podrían mitigar daños de forma más organizada sin provocar alarma global. En 1908, el evento de Tunguska en Siberia derribó árboles en un área de más de 2.000 kilómetros cuadrados y demostró el peligro de objetos cósmicos menores. Hoy, gracias a sistemas automatizados como ATLAS y Pan-STARRS, se localizan cientos de asteroides potencialmente cercanos cada año. El creciente número de descubrimientos impulsa iniciativas de defensa planetaria promovidas por la ONU. La NASA y la ESA intercambian datos con institutos independientes y laboratorios universitarios. Se utilizan métodos avanzados de radar, espectroscopia y análisis fotométricos para determinar la composición de estos cuerpos. Los científicos consideran viable el desvío de asteroides con un impacto cinético o, en algunos casos, con propulsores que alteren su trayectoria. Cada hallazgo promueve la cooperación internacional y la búsqueda de respuestas conjuntas. 2024 YR4 es un recordatorio de que el espacio aún encierra sorpresas. Otros objetos similares podrían aparecer en cualquier momento, motivando esfuerzos continuos de vigilancia más intensos. El asteroide 2024 YR4 mantiene un bajo porcentaje de impacto en 2032, pero las observaciones van a continuar. Las agencias espaciales refuerzan la vigilancia y la colaboración internacional. ¿Qué opinas sobre estos esfuerzos de defensa planetaria? Queremos escuchar tus comentarios. Síguenos en Spotify para más actualizaciones. Es tu oportunidad de sumarte al diálogo y compartir ideas constructivas y opiniones. BibliografíaThe Washington PostESAThe GuardianSky at NightConviértete en un seguidor de este podcast: https://www.spreaker.com/podcast/flash-diario-de-el-siglo-21-es-hoy--5835407/support.
durée : 00:05:11 - Avec sciences - par : Alexandre Morales - Grâce au Very Large Telescope de l'ESO, des astronomes ont pu mesurer la vitesse phénoménale des vents sur l'exoplanète WASP-127b. Leurs résultats ont été publiés dans la revue Astronomy and Astrophysics.
Astronomy Daily - The Podcast: S04E17Join host Steve Dunkley and his digital offsider Hallie, for another enlightening episode of Astronomy Daily, where we delve into the mysteries of space and the latest astronomical developments. Today, we explore intriguing stories that will captivate your imagination and expand your cosmic knowledge.Highlights:- China's Spaceplane Returns: China's enigmatic spaceplane has returned after 268 days in orbit. Discover the secretive nature of its mission and the potential future of reusable spacecraft.- Arecibo Observatory Collapse Report: A comprehensive report on the collapse of the iconic Arecibo Observatory has been released. Learn about the findings and the future plans for this historic site.- SpaceX's Starship Test Mishap: The FAA investigates the recent explosion during SpaceX's Starship test flight. Uncover what went wrong and SpaceX's plans for future launches.- Light Pollution Threat to VLT: The ESO's Very Large Telescope in Chile faces a threat from a proposed renewable energy project. Explore the potential impact on astronomical observations and the debate over sustainable development.For more cosmic updates, visit our website at astronomydaily.io. Join our community on social media by searching for #AstroDailyPod on Facebook, X, and YouTubeMusic. Share your thoughts and connect with fellow space enthusiasts. Don't forget to subscribe to the podcast on Apple Podcasts, Spotify, YouTubeMusic, iHeartRadio, or wherever you get your podcasts.Thank you for tuning in. This is Steve signing off. Until next time, keep looking up and stay curious about the wonders of our universe.00:00 - Happy birthday to my favorite person in the world, Graham Dunkley00:59 - China's reusable spaceplane returns to Earth after 268 days in orbit03:18 - The Arecibo Observatory in Puerto Rico collapsed in 2020 following Hurricane Maria08:04 - FAA to investigate Starship 7 test explosion the U S. agency says10:47 - World's most precious sky observing location faces risk of light pollution from renewable project✍️ Episode ReferencesXinhua[Xinhua News Agency](http://www.xinhuanet.com/english/)Harvard Smithsonian Center for Astrophysics[Harvard Smithsonian](https://www.cfa.harvard.edu/)Arecibo Observatory[Arecibo Observatory](https://www.naic.edu/)National Science Foundation[NSF](https://www.nsf.gov/)University of Central Florida[UCF](https://www.ucf.edu/)SpaceX[SpaceX](https://www.spacex.com/)European Southern Observatory[ESO](https://www.eso.org/)AES Energy[AES Energy](https://www.aes.com/)Renewables Now[Renewables Now](https://renewablesnow.com/)Contact (Movie)[Contact on IMDb](https://www.imdb.com/title/tt0118884/)Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-the-podcast--5648921/support.
SpaceTime with Stuart Gary | Astronomy, Space & Science News
SpaceTime Series 27 Episode 156Superflares: A Century-Long Threat?A new study warns of the potential for our Sun to unleash superflares, with the threat estimated at once per century. These massive eruptions could engulf the Earth, challenging our understanding of solar behaviour. Evidence from other sun-like stars suggests that such violent solar events may be more common than previously thought, urging caution as we continue to study these phenomena.Binary Star Discovery Near Galactic CoreAstronomers have identified the first binary star system near Sagittarius A*, the supermassive black hole at the centre of our galaxy. This discovery, made using the European Southern Observatory's Very Large Telescope, offers new insights into how stars can survive in extreme gravitational environments. The findings could pave the way for detecting planets orbiting close to this massive black hole.NASA's Lucy Mission: Onward to JupiterNASA's Lucy spacecraft has completed its second close flyby of Earth, gaining a gravity assist to propel it towards Jupiter's Trojan asteroids. This manoeuvre is part of Lucy's 12-year mission to study these ancient celestial bodies, believed to be remnants from the early solar system. The spacecraft's journey promises to unlock new secrets about the formation of our planetary neighbourhood.00:00 This is Spacetime Series 27, episode 156 for broadcast on 27th December 202400:48 New observations suggest our sun may be far more violent than previously thought05:17 Astronomers detect binary star system near supermassive black hole08:49 NASA's Lucy spacecraft makes second close flyby of the Earth10:37 NASA's Lucy mission is heading to the Jupiter Trojans12:26 Sea ice levels in the ocean surrounding Antarctica reach new record lows in 202313:52 A new study claims drinking moderate amounts of wine can ward off heart disease15:05 There are headlines saying believing in Loch Ness monster makes you less stressedwww.spacetimewithstuartgary.comwww.bitesz.com
Astronomy Daily - The Podcast: S03E243Welcome to Astronomy Daily, your daily dose of the most fascinating developments in space science and astronomical discoveries. I'm Anna, and today we're exploring some incredible stories from across the cosmos.Highlights:- Game-Changing Telescopes: Discover the potential of the Giant Magellan Telescope (GMT) and the 30 Peter Telescope (TMT) as highlighted in a recent National Science Foundation report. These groundbreaking telescopes promise to redefine our understanding of the universe, addressing questions about galaxy formation, dark matter, and the possibility of extraterrestrial life. Despite their potential, these projects face financial and technical hurdles, needing $1.6 billion to progress.- The Quest for Water on Mars: Delve into the ongoing search for liquid water on Mars. A new study challenges previous assumptions, suggesting that features like recurring slope lineae may be dry flows of sand and dust. Researchers are now focusing on brines, though their stability on Mars remains questionable. Despite setbacks, the search continues, driven by the hope that life might have adapted to Mars' extreme conditions.- China's Space Sector Milestones: Learn about Landspace's recent achievements, including a successful launch and a $123 million funding boost for reusable methane-powered rockets. This marks a significant step in China's commercial space sector, with plans for cargo missions to the Tiangong space station by 2026.- The Running Chicken Nebula: Marvel at the newly released image of the Running Chicken Nebula, captured by the European Southern Observatory's Very Large Telescope. This emission nebula, located 6,500 light-years away, captivates with its whimsical, chicken-like shape and vibrant colors.- Stargazing Tips for Beginners: If you've received a telescope recently, Sky & Telescope offers essential tips for getting started. Learn how to familiarize yourself with your equipment, practice during daylight hours, and choose the best celestial targets like the Moon, Jupiter, and Saturn for your first observations. Link: https://skyandtelescope.org/astronomy-resources/stargazing-basics/get-started-with-that-new-holiday-telescope/For more cosmic updates, visit our website at astronomydaily.io. Join our community on social media by searching for #AstroDailyPod on Facebook, X, Tumblr, 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 the latest developments in space science and astronomy00:25 - Two telescopes so powerful they'll redefine how we see the universe01:23 - The NSF report says both projects need significant funding to keep going02:53 - New research casts doubt on hopes of finding liquid water on Mars05:23 - Launch startup Landspace has secured 900 million yuan in funding from China fund07:16 - New image from the European Southern Observatory shows the Running Chicken Nebula10:04 - The Moon is an absolutely spectacular target for new observers11:32 - This is the end of today's Astronomy Daily podcast✍️ Episode ReferencesNational Science Foundation (NSF)[https://www.nsf.gov/](https://www.nsf.gov/)Giant Magellan Telescope (GMT)[https://www.gmto.org/](https://www.gmto.org/)Thirty Peter Telescope (TMT)[https://www.tmt.org/](https://www.tmt.org/)European Southern Observatory (ESO)[https://www.eso.org/](https://www.eso.org/)Proceedings of the National Academy of Sciences[https://www.pnas.org/](https://www.pnas.org/)Landspace[https://www.landspace.com/](https://www.landspace.com/)Sky & Telescope[https://skyandtelescope.org/](https://skyandtelescope.org/)Running Chicken Nebula (IC 2872/Gum 40)[https://en.wikipedia.org/wiki/IC_2872](https://en.wikipedia.org/wiki/IC_2872)Tiangong Space Station[https://en.wikipedia.org/wiki/Tiangong_space_station](https://en.wikipedia.org/wiki/Tiangong_space_station)Vincent Chevrier[https://www.uark.edu/research/chevrier/](https://www.uark.edu/research/chevrier/)Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-the-podcast--5648921/support.
SpaceTime with Stuart Gary | Astronomy, Space & Science News
SpaceTime Series 27 Episode 121*A New Planet Discovered Orbiting Barnard's StarAstronomers have discovered a new exoplanet orbiting Barnard's Star, the closest single star to the Sun. This newly found planet, Barnard b, has about half the mass of Earth and completes an orbit around its host star every three Earth days. Located 5.96 light-years away, Barnard's Star is a small red dwarf in the constellation Ophiuchus. The discovery was made using the European Southern Observatory's Very Large Telescope and has sparked interest due to its low mass and proximity to its star. The study also hints at the existence of three more potential exoplanets in the system, although additional observations are needed for confirmation.*ESA's Hera Mission LaunchThe European Space Agency's Hera mission is set to launch, aimed at exploring the aftermath of NASA's DART mission impact on the asteroid Dimorphos. The mission will provide detailed analysis of the impact site and the asteroid's composition, mass, and structural changes. Hera will also deploy two cubesats, Milani and Juventus, to perform close-up observations and experiments. The mission is crucial for understanding how to protect Earth from potential asteroid threats in the future.*Spectacular Annular Solar EclipseA stunning annular solar eclipse, known as a "ring of fire," has been witnessed by people across the eastern and southern Pacific, as well as parts of South America. The eclipse, which occurs when the Moon is slightly further from Earth, left a bright ring of sunlight visible around the Moon's silhouette. The event was best viewed from Easter Island and parts of Argentina and Chile, with partial views seen in other regions including Bolivia, Peru, and New Zealand.00:00:00 - This is spacetime series 27, episode 121, for broadcasts on 7 October 202400:00:47 - Astronomers have discovered a planet orbiting Barnard star, the closest single00:04:48 - European Space Agency's Hera planetary defence mission slated for launch today00:08:40 - NASA's Dart spacecraft crashed into the dimorphos asteroid in 202200:12:11 - The people of the east and South Pacific and South America witnessed an annual solar eclipse00:14:07 - Scientists have developed a new drug delivery system for type two diabetes00:17:02 - Women are turning to psychics to find out if their husbands are cheatingwww.spacetimewithstuartgary.comwww.bitesz.com
CONSIDERE APOIAR O TRABALHO DO SPACE TODAY, ASSINANDO A PLATAFORMA SPACE TODAY PLUS PREMIUM, POR APENAS R$29,00 POR MÊS, MENOS DE 1 REAL POR DIA!!! https://spacetodayplus.com.br/premium/ Utilizando o Very Large Telescope do Observatório Europeu do Sul (VLT do ESO), os astrónomos descobriram um exoplaneta em órbita da estrela de Barnard, a estrela isolada mais próxima do nosso Sol. Neste exoplaneta recém-descoberto, que tem pelo menos metade da massa de Vênus, um ano dura pouco mais de três dias terrestres. As observações da equipa também sugerem a existência de mais três candidatos a exoplanetas, em várias órbitas em torno da estrela. Localizada a apenas seis anos-luz de distância, a estrela de Barnard é o segundo sistema estelar mais próximo — depois do grupo de três estrelas de Alfa Centauri — e a estrela individual mais próxima de nós. Devido à sua proximidade, é o alvo principal na busca por exoplanetas semelhantes à Terra. Apesar de uma detecção promissora em 2018 , nenhum planeta orbitando a estrela de Barnard foi confirmado até agora. A descoberta deste novo exoplaneta — anunciada num artigo publicado hoje na revista Astronomy & Astrophysics — é o resultado de observações feitas ao longo dos últimos cinco anos com o VLT do ESO , localizado no Observatório do Paranal, no Chile. “Mesmo que demorasse muito, estávamos sempre confiantes de que poderíamos encontrar algo”, diz Jonay González Hernández, investigador do Instituto de Astrofísica de Canarias, em Espanha, e autor principal do artigo. A equipa procurava sinais de possíveis exoplanetas dentro da zona habitável ou temperada da estrela de Barnard – a região onde pode existir água líquida na superfície do planeta. Anãs vermelhas como a estrela de Barnard são frequentemente alvo de astrônomos, uma vez que planetas rochosos de baixa massa são mais fáceis de detectar ali do que em torno de estrelas maiores semelhantes ao Sol. [1] Barnard b [2] , como é chamado o exoplaneta recém-descoberto, está vinte vezes mais próximo da estrela de Barnard do que Mercúrio está do Sol. Ele orbita sua estrela em 3,15 dias terrestres e tem uma temperatura superficial de cerca de 125 °C. “Barnard b é um dos exoplanetas de menor massa conhecidos e um dos poucos conhecidos com massa menor que a da Terra. Mas o planeta está demasiado próximo da estrela hospedeira, mais próximo do que a zona habitável”, explica González Hernández. “ Mesmo que a estrela seja cerca de 2.500 graus mais fria que o nosso Sol, lá é quente demais para manter água líquida na superfície. ” Para as suas observações, a equipa utilizou o ESPRESSO , um instrumento altamente preciso concebido para medir a oscilação de uma estrela causada pela atração gravitacional de um ou mais planetas em órbita. Os resultados obtidos nestas observações foram confirmados por dados de outros instrumentos também especializados na caça de exoplanetas: HARPS no Observatório de La Silla do ESO, HARPS-N e CARMENES . Os novos dados não apoiam, no entanto, a existência do exoplaneta reportado em 2018. Além do planeta confirmado, a equipe internacional também encontrou indícios de mais três candidatos a exoplanetas orbitando a mesma estrela. Estes candidatos, no entanto, necessitarão de observações adicionais com o ESPRESSO para serem confirmados. “Precisamos agora continuar a observar esta estrela para confirmar os outros sinais candidatos”, afirma Alejandro Suárez Mascareño, investigador também do Instituto de Astrofísica das Ilhas Canárias e coautor do estudo. “ Mas a descoberta deste planeta, juntamente com outras descobertas anteriores, como Proxima b e d , mostra que o nosso quintal cósmico está cheio de planetas de baixa massa .”
The 365 Days of Astronomy, the daily podcast of the International Year of Astronomy 2009
Hosted by Dr. Jacinta Delhaize & Dr. Daniel Cunnama. The 5th of December 2022 sees the commencement of construction of the long-awaited Square Kilometre Array (SKA)! We are honoured to be joined by the SKA Observatory Council Chairperson, Dr. Catherine Cesarsky to talk about this momentous occasion. The SKA Observatory (SKAO) is a next-generation radio astronomy facility that will revolutionise our understanding of the Universe and the laws of fundamental physics. Formally known as the SKA Observatory, the SKAO is an intergovernmental organisation bringing together nations from around the world. The observatory consists of the SKAO Global Headquarters in the UK, the SKAO's two telescopes at radio-quiet sites in South Africa and Australia, and associated facilities to support the operations of the telescopes. The SKA telescopes: Composed of respectively hundreds of dishes and thousands of antennas, the SKAO's telescopes will be the two most advanced radio telescopes on Earth. Together with other state-of-the-art research facilities, the SKAO's telescopes will explore the unknown frontiers of science and deepen our understanding of key processes, including the formation and evolution of galaxies, fundamental physics in extreme environments and the origins of life. Dr. Cesarsky was appointed Chair of the SKA Board of Directors in 2017, and her distinguished career spans some of the biggest international astronomy projects of recent years. As Director-General of the European Southern Observatory she oversaw the Very Large Telescope, the start of construction of the Atacama Large Millimeter Array (ALMA) and launched the Extremely Large Telescope project, one of the key astronomical facilities of the coming decades along with the SKA. Among her other prestigious roles, Dr Cesarsky was President of the International Astronomical Union and High Commissioner for Atomic Energy in France. She is known for her successful research activities in high energy and in infrared astronomy and is member or foreign member of science academies over the world, including Europe (Academia Europaea), France (Académie des Sciences), United Kingdom (Royal Society), United States (NAS), Sweden (Royal Swedish Academy of Sciences). SKAO: https://www.skao.int/ 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.
La collaboration GRAVITY, qui exploite l'interférométrie optique avec le Very Large Telescope vient de découvrir indirectement la présence d'une planète de la taille de Neptune en orbite au sein de la binaire naine rouge la plus proche du Soleil : GJ 65, située à 2,67 pc (8,7 années-lumière). Ils publient leur étude dans Astronomy&Astrophysics. Source Astrometric detection of a Neptune-mass candidate planet in the nearest M-dwarf binary system GJ65 with VLTI/GRAVITYA&A Volume 685 (14 May 2024)https://doi.org/10.1051/0004-6361/202449547
Als grote sterren sterven, dan doen ze dat vaak met nogal wat bombarie. De explosie die dan plaatsvindt kan onder andere zorgen voor een enorme verplaatsing van gas. Gas met daarin allerlei chemische elementen die een rol spelen bij de vorming van nieuwe sterren, maar die ook zorgen voor een soort vervuiling van de ruimte tussen stelsels in. Terwijl zo'n gaswolk tijdens een explosie naar buiten wordt geduwd, verdunt het gas steeds verder en neemt ook de hoeveelheid licht af. Daarmee zijn die uitdijende wolken moeilijk te detecteren. Met de Very Large Telescope in Chili is dat nu toch gelukt. Het zorgde voor een indrukwekkende hoge resolutie kaart van zo'n uitstromende wolk. En niet zomaar eentje. De wolk is zo groot dat het 20.000 jaar zou duren voor licht om van het ene uiteinde van de wolk naar het andere te reizen. De gaswolk, die onder andere vol zit met zuurstof, stikstof en zwavel, is dus gigantisch en qua massa vergelijkbaar met 50 miljoen keer de zon. De zeldzame kennis over de samenstelling en het gedrag van dit soort gaswolken vertelt onderzoekers meer over het ontstaan, maar ook het verdwijnen van sterrenstelsels. Ze hopen dan ook deze wolk met nog meer detail te bestuderen, maar gaan zeker ook achter andere gaswolken aan. Lees hier meer over het onderzoek: A giant galactic explosion catches galaxy pollution in the actSee omnystudio.com/listener for privacy information.
Een Europees team van astronomen heeft het grootste stellaire zwarte gat van onze Melkweg ontdekt. Het is meer dan dertig keer zo zwaar als de zon en bevindt zich in het sterrenbeeld Arend. Het was een toevallige ontdekking die werd gedaan terwijl de vierde datarelease van ESA's ruimtetelescoop Gaia werd voorbereid. Tijdens de Gaia-missie worden de bewegingen van miljarden sterren in de Melkweg gevolgd. Zo zagen ze in de data bewijs voor een vreemde wiebelbeweging van een ster. Dat was een aanwijzing dat er een zwart gat in de buurt moest zijn. Dat het om een zwart gat met zoveel massa gaat bleek vervolgens uit gegevens van de Very Large Telescope in Chili. Eigenlijk zou de nieuwe data van de ruimtetelescoop pas eind 2025 vrijgegeven worden, maar deze vondst was te bijzonder om tot dan te bewaren. Onderzoekers wereldwijd kunnen nu aan de slag om het zwarte gat en de ster die eromheen draait nader te bestuderen. De groep sterren waartoe deze ster en het zwarte gat behoren is ooit opgenomen door onze Melkweg. Die sterstroom was eerder al eens ontdekt door de groep van Amina Helmi van de Rijksuniversiteit Groningen. Dat er ook een flink zwart gat in zo'n sterstroom kan zitten, dat is nooit eerder gezien. Waar de sterstroom met het zwarte gat precies vandaan is gekomen, voordat het door onze Melkweg werd opgenomen, daar hopen onderzoekers dankzij nieuwe waarnemingen snel meer over te kunnen zeggen. Lees hier meer over het onderzoek: Wetenschappers ontdekken grootste stellaire zwarte gat van de MelkwegSee omnystudio.com/listener for privacy information.
This episode of Space Nuts is brought to you with the support of NordVPN....to get the special Space Nuts deal visit www.nordvpn.com/spacenutsEmbark on a celestial detective story in this latest episode of Space Nuts, as your guides through the galaxy, Andrew Dunkley and Professor Fred Watson, unravel the curious case of Venus's quasi-moon. The tale begins with an asteroid that's not quite what it seems, orbiting Venus in a way that defies expectations. The mystery deepens with the asteroid's peculiar name, which comes with its own humorous backstory involving a podcast, a bedroom wall poster, and a case of mistaken identity.Then, shift gears and join the hunt for the universe's elusive sulfur. Why does this common element appear to be hiding in plain sight? The answer lies in the heart of the Milky Way, where a groundbreaking study using the Very Large Telescope has finally solved a long-standing astronomical puzzle. Discover how improved data quality has brought the cosmic abundance of sulfur into clear view, and why planetary nebulae, the final breaths of sun-like stars, are key to this revelation.With Fred on the mend from a pesky tick bite, the dynamic duo delves into the intricacies of celestial mechanics, the naming conventions of space objects, and the importance of sulfur in both the cosmos and our everyday lives. Don't miss this episode of Space Nuts, where the wonders of the universe are made accessible, the seemingly mundane becomes fascinating, and every question leads to a deeper appreciation of the cosmos.To continue your journey through the stars and uncover more secrets of the universe, subscribe to Space Nuts on your preferred podcast platform. Until we embark on our next stellar voyage, keep your eyes on the skies and your curiosity unbounded.Episode Chapters(00:00) Welcome to Space Nuts: Astronomy and Space Science(01:45) The story of Venus's quasi-moon and its mistaken identity(07:10) Andrew and Fred discuss the hunt for missing sulfur in the universe(15:23) Planetary nebulae and the solving of the sulfur anomaly(22:45) The broad applications of sulfur, from volcanoes to industry(24:30) Wrapping up and a reminder about Space Nuts Q&ABecome a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts--2631155/support.
Using ESO's Very Large Telescope, astronomers have found a metal ‘scar' imprinted on the surface of a dead star. This video summarises the discovery.
Using ESO's Very Large Telescope, astronomers have found a metal ‘scar' imprinted on the surface of a dead star. This video summarises the discovery.
Met behulp van de Very Large Telescope in Chili hebben astronomen de helderste quasar in zijn soort waargenomen. Quasars zijn de heldere kernen van verre sterrenstelsels. Ze worden van energie voorzien door superzware zwarte gaten. In dit geval is dat een zwart gat dat per dag een zonsmassa aankomt, waarmee het ook het snelst groeiende zwarte gat is dat we kennen. De nu ontdekte quasar is zover van de aarde af, dat zijn licht er meer dan 12 miljard jaar over heeft gedaan ons te bereiken. De schijf aan materie die zich rondom zijn zwarte gat heeft opgehoopt is ongelooflijk helder. 500 biljoen keer zo fel als onze zon. In 1980 was deze heldere kern al eens vastgelegd, maar vervolgens afgedaan als iets anders, want: te fel om een quasar te kunnen zijn. Er waren nieuwe metingen met de VLT voor nodig om te bevestigen dat het er toch echt eentje was. En wat voor één. Lees hier meer over de ontdekking: Astronomen (her)ontdekken recordbrekende quasarSee omnystudio.com/listener for privacy information.
In deze aflevering bespreken we nieuwe wetenschappelijke inzichten met betrekking tot het prille heelal. En niet alleen maar gedaan met de JWST, maar ook met de Very Large Telescope van de ESO.The accretion of a solar mass per day by a 17-billion solar mass black hole:https://www.eso.org/public/archives/releases/sciencepapers/eso2402/eso2402a.pdfBrightest and fastest-growing: astronomers identify record-breaking quasar:https://www.eso.org/public/news/eso2402/Very Large Telescope:https://www.eso.org/public/teles-instr/paranal-observatory/vlt/Did monster black holes or galaxies come first? The James Webb Space Telescope may have a surprise answer:https://www.space.com/james-webb-space-telescope-black-holes-galaxies-firstWhich Came First: Supermassive Black Holes or Galaxies? Insights from JWST:https://iopscience.iop.org/article/10.3847/2041-8213/ad1bf0This is the Oldest Black Hole Ever Seen:https://www.universetoday.com/165357/this-is-the-oldest-black-hole-ever-seenA small and vigorous black hole in the early Universe:https://arxiv.org/pdf/2305.12492.pdfPrimordial black hole:https://en.m.wikipedia.org/wiki/Primordial_black_holeHow can you tell a black hole made out of antimatter from a black hole made out of matter?https://www.wtamu.edu/~cbaird/sq/mobile/2014/05/16/how-can-you-tell-a-black-hole-made-out-of-antimatter-from-a-black-hole-made-out-of-matter/De Zimmerman en Space podcast is gelicenseerd onder een Creative Commons CC0 1.0 licentie.http://creativecommons.org/publicdomain/zero/1.0
Dr. Rebecca Davies is an Astro3D postdoctoral researcher and has just been awarded an ARC-DECRA fellowship at the Swinburne University of Technology in Melbourne, Australia. Rebecca researches the stuff that flows out of Galaxies AKA ‘Galactic Outflows' … and she looks across the majority of the history of the universe from right now and right back through time to less than a billion years after the Big Bang. Rebecca uses spectroscopic data from Hubble, JWST … the Awesome James Webb Space Telescope and the VLT, the Very Large Telescope which consists of a optical array of four 8.2 m telescopes high up in the Atacama desert in Chile. From these data, Rebecca is creating new understandings of how Galaxies evolve, filling in some of those gaps in our knowledge, and her Honours and PhD students are in multiple research groups on related quests to understand galactic evolution. Now, when not doing Astrophysics. Rebecca can most likely be found bike riding or playing violin … and she's currently a violinist with the brilliant Zelman Memorial Symphony Orchestra in Melbourne.
This episode of Space Nuts is brought to you by Incogni...the new data protection service. And you can get a whopping 60% off their incredibly low subscription rates just by being a Space Nuts listener. Details and availability at www.icogni.com/spacenutsDoes the idea of unraveling the enigmatic origins of solar winds sound familiar? Have you been told to study textbooks or watch documentaries in hopes of understanding, only to be left feeling frustrated and confused? If so, you're not alone. The pain of seeking knowledge, but finding it elusive, can be disheartening. But fear not, because in this podcast episode, we have uncovered groundbreaking discoveries made by the Solar Orbiter, shedding light on the clandestine origins of solar winds. Prepare to finally quench your thirst for understanding and leave the frustration behind. In this episode, you will be able to: · Disentangle the mysteries surrounding the origins of solar winds, thanks to insightful revelations made by the Solar Orbiter. · Extract the coded data from Neptune's dark spot, assessed through state-of-the-art ground-based telescopes. · Draw distinctions between the captivating spots on Uranus and Neptune, revealing their probable causes and importance. · Unearth the cryptic behavior and structure of gas giants and the nature of tempestuous storms weaving within their atmospheres. · Paint a description of the intricate density of nebulae, gauging the feasibility of This is the only opportunity we've got, is to learn what our star is doing, because the other ones are all too far away to study at this level. - Andrew Dunkley Uncovering the origins of solar winds Recent discoveries by the NASA and ESA collaboration, the Solar Orbiter, may offer fresh insights to unravel the enigmatic origins of solar winds. Observations of tiny jets of material spurting from the Sun's surface hint at the potential driving forces behind these solar winds. Harnessing maximum knowledge on this subject is crucial as this phenomena significantly impacts our planet's outer atmospheric conditions. The resources mentioned in this episode are: · Visit bitesz.com for more information on the NASA collaboration and the solar orbiter. · Check out the article on bitesz.com for a detailed explanation of the observations made by the Solar Orbiter. · Learn more about the Great Red Spot on Jupiter and its significance by visiting bitesz.com. · Explore the work of Trevor Barry, an Australian observer of spots on Saturn, and his collaboration with NASA on the Cassini spacecraft mission on bitesz.com. · Discover the latest observations of spots on Neptune made by the European Southern Observatory's Very Large Telescope on Ceraparinal in northern Chile by visiting bitesz.com. · Find out more about the Muse instrument used to study Neptune's spots and its capabilities on bitesz.com. · Experience the stunning imagery and insights provided by the Hubble Space Telescope by visiting the official NASA website. · Stay updated on the latest discoveries and research in the field of astronomy by subscribing to the Space Nuts podcast. · Support the work of the European Southern Observatory and their groundbreaking research by donating to their organization. · Join the Space Nuts community and engage in discussions about space and astronomy on their official social media channels.This 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
Dr Jesse Van De Sande is the ASTRO3D research fellow at the Sydney Institute for Astronomy at the School of Physics at the University of Sydney. He is an observational astronomer who uses many of the world's most iconic and powerful telescopes, including the four 8 meter telescopes that comprise the VLT, the Very Large Telescope high up in the Andes in Chile. He is researching galaxies at low and high Redshift up to 15 billion light years away, and his research focuses on how massive galaxies form, evolve, and die. Jesse co-leads a team which has published new and amazing discoveries about our very own Milky Way Galaxy, which some say are destined to re-write the astronomy textbooks …. And he has a long history with the famous SAMI survey. In his generous in-depth interview we hear about his journey from a small village in northern Netherlands to researching the largest structures in our universe. He brings us up to date with the SAMI and GECKO surveys, his outreach work, his latest research and collaborations and his work on the promotion of Nuclear Fusion energy and our need to solve pervasive social problems. You will love how Jesse showcases his perfectionist approach to complex and sky-breaking science with absolute and approachable clarity. From this interview you will come away with a rich and clear understanding of both this exceptional scientist and his wonderful science. Enjoy!
Using ESO's Very Large Telescope, astronomers have found the fingerprints left by the explosions of the first stars.
Using ESO's Very Large Telescope, astronomers have found the fingerprints left by the explosions of the first stars.
Space scientists say they have identified what might be the "perfect explosion," but much work remains to fully explain the observation. The explosion, called a kilonova, was observed in 2017 and has been studied carefully since then. Astronomers say a kilonova happens when two neutron stars crash into each other. The rapidly growing explosion that they described went beyond the researchers' expectations. The event led to the formation of a black hole: an object with so much gravity that even light cannot escape it. The two neutron stars had a combined mass of 2.7 times that of our sun. They orbited each other for billions of years before crashing into each other at a high speed and exploding.太空科学家表示,他们已经确定了可能是“完美爆炸”的原因,但要充分解释这一观察结果还有很多工作要做。 2017 年观察到这种称为千新星的爆炸,并从那时起对其进行了仔细研究。天文学家说,当两颗中子星相互碰撞时,就会发生千新星爆发。他们描述的快速增长的爆炸超出了研究人员的预期。这一事件导致了黑洞的形成:一个引力如此之大的物体,连光都无法逃脱。这两颗中子星的总质量是我们太阳的 2.7 倍。它们相互绕行了数十亿年,然后高速相撞并爆炸。This event took place in a galaxy called NGC 4993. The galaxy is at least 140 million light years away from Earth in the direction of the constellation Hydra. A light year is the distance light travels in a year. Astronomers used the European Southern Observatory's Chile-based Very Large Telescope to study the kilonova.The existence of kilonova explosions was proposed in 1974. The theory was confirmed in 2013. But astronomers did not know what they looked like until one was identified in 2017 and studied carefully. "It is a perfect explosion in several ways. It is beautiful...in the simplicity of the shape, and in its physical" importance, said Albert Sneppen of the Cosmic Dawn Center in Copenhagen, Denmark. Sneppen was the lead writer of the research published in Nature.这一事件发生在一个名为 NGC 4993 的星系中。该星系在九头蛇星座的方向上距离地球至少有 1.4 亿光年。一光年是光在一年中传播的距离。天文学家利用欧洲南方天文台位于智利的甚大望远镜研究千新星。1974 年提出了千新星爆炸的存在。该理论于 2013 年得到证实。但天文学家直到 2017 年才发现一颗新星并不知道它们长什么样。仔细研究。丹麦哥本哈根宇宙黎明中心的 Albert Sneppen 说:“从几个方面来说,这是一次完美的爆炸。它很美……在形状的简单性和物理上的”重要性。 Sneppen 是发表在《自然》杂志上的这项研究的主要作者。The researchers had expected the explosion to look flat and round, with a jet of material coming out of it. "To be honest, we are really going back to the drawing board with this," said study co-writer Darach Watson of the Cosmic Dawn Center. "Given the extreme nature of the physical conditions...there may well be fundamental physics here that we don't understand yet," Watson added. The two neutron stars began their lives as large normal stars in a two-star system called a binary system. Each exploded and collapsed after running out of fuel, leaving behind a small and dense center, or core, only 20 kilometers across. The neutron stars then slowly drew nearer to each other. They were then stretched out and pulled apart because of the power of the other's gravity. Their inner parts crashed into each other at about 25 percent of the speed of light, creating the most intense magnetic fields in the universe. The explosion released the luminosity of a billion suns for a few days.研究人员原以为爆炸看起来是扁平的、圆形的,并有一股物质从中喷出。 “老实说,我们真的要回到绘图板,”宇宙黎明中心的研究合著者 Darach Watson 说。 “鉴于物理条件的极端性质......这里很可能存在我们尚不了解的基础物理学,”沃森补充道。这两颗中子星在称为双星系统的双星系统中作为大型普通恒星开始它们的生命。每一个都在燃料耗尽后爆炸和坍塌,留下一个小而致密的中心或核心,只有 20 公里宽。然后中子星彼此慢慢靠近。然后由于对方的引力,他们被拉伸并拉开。它们的内部部分以大约 25% 的光速相互碰撞,产生了宇宙中最强烈的磁场。爆炸释放了十亿个太阳几天的光度。The two briefly formed a single massive neutron star that then collapsed to form a black hole. The outer parts of the neutron stars, however, were stretched into long streamers, with some material flying off into space. During the process, the densities and temperatures were so strong that they created heavy elements, including gold, platinum, arsenic, uranium and iodine. Sneppen used the term challenge, meaning a difficult task or problem, to talk about the findings, which are hard understand. "This is fundamentally astonishing, and an exciting challenge for any theoreticians and numerical simulations," Sneppen said. "The game is on."两者短暂地形成了一颗巨大的中子星,然后坍塌形成了一个黑洞。然而,中子星的外部被拉伸成长长的流光,一些物质飞向太空。在此过程中,密度和温度如此之高,以至于产生了重元素,包括金、铂、砷、铀和碘。 Sneppen 使用术语挑战,意思是一项艰巨的任务或问题,来谈论难以理解的发现。 “对于任何理论家和数值模拟来说,这从根本上来说是惊人的和令人兴奋的挑战,”Sneppen 说。 “比赛开始了。”
A reminder that the observatory has open nights on the second and fourth Saturdays of each month at 8pm. You need to book which you can do from their website saao.ac.za. The Very Large Telescope and the European Space Agency's space telescopes have combined strengths and produced images of an exoplanet orbiting around a star in the constellation of Lepus. You can see this for yourself either on space.com or on the European Southern Observatory's website eso.org.
In a quieter walk than usual, Chris and Mr Max tell the story of Betelgeuse - the armpit of the Great One, and the star that might one day provide a spectacular supernova. They also encourage you to find the constellation of Orion, the signpost to the winter sky, enjoy the odd bit of chicken and mourn the loss of the bone they found on Tuesday. There's a great guide to Orion here: https://www.skyatnightmagazine.com/advice/skills/orion-constellation-best-targets-observe/ and you can see some spectacular pictures of Betelgeuse taken with the Very Large Telescope here: https://www.eso.org/public/news/eso2003/
Updates on Artemis I. Predicting an asteroid strike with stunning accuracy. Webb's view of Titan. New adaptive optics for the Very Large Telescope.
Updates on Artemis I. Predicting an asteroid strike with stunning accuracy. Webb's view of Titan. New adaptive optics for the Very Large Telescope.
The homogeneity of chemical abundances in H II regions of the Magellanic Clouds by G. Domínguez-Guzmán et al. on Sunday 16 October We use very deep spectra obtained with the Ultraviolet-Visual Echelle Spectrograph at the Very Large Telescope to derive physical conditions and chemical abundances of four H II regions of the Large Magellanic Cloud (LMC) and four H II regions of the Small Magellanic Cloud (SMC). The observations cover the spectral range 3100-10400 A with a spectral resolution of $Deltalambdagelambda/11600$, and we measure 95-225 emission lines in each object. We derive ionic and total abundances of O, N, S, Ne, Ar, Cl, and Fe using collisionally excited lines. We find average values of $12+log(mbox{O/H})=8.37$ in the LMC and $8.01$ in the SMC, with standard deviations of $sigma=0.03$ and 0.02~dex, respectively. The S/O, Ne/O, Ar/O, and Cl/O abundance ratios are very similar in both clouds, with $sigma=0.02$-0.03~dex, which indicates that the chemical elements are well mixed in the interstellar medium of each galaxy. The LMC is enhanced in N/O by $sim0.20$~dex with respect to the SMC, and the dispersions in N/O, $sigma=0.05$~dex in each cloud, are larger than those found for the other elements. The derived standard deviations would be much larger for all the abundance ratios, up to 0.20~dex for N/O, if previous spectra of these objects were used to perform the analysis. Finally, we find a wide range of iron depletions in both clouds, with more than 90 per cent of the iron atoms deposited onto dust grains in most objects. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.07460v1
Using ESO's Very Large Telescope, barium has been detected in the atmosphere of two exoplanets.
Using ESO's Very Large Telescope, barium has been detected in the atmosphere of two exoplanets.
Detection of barium in the atmospheres of the ultra-hot gas giants WASP-76b and WASP-121b by T. Azevedo Silva et al. on Thursday 13 October High-resolution spectroscopy studies of ultra-hot Jupiters have been key in our understanding of exoplanet atmospheres. Observing into the atmospheres of these giant planets allows for direct constraints on their atmospheric compositions and dynamics while laying the groundwork for new research regarding their formation and evolution environments. Two of the most well-studied ultra-hot Jupiters are WASP-76b and WASP-121b, with multiple detected chemical species and strong signatures of their atmospheric dynamics. We take a new look at these two exceptional ultra-hot Jupiters by reanalyzing the transit observations taken with ESPRESSO at the Very Large Telescope and attempt to detect additional species. To extract the planetary spectra of the two targets, we corrected for the telluric absorption and removed the stellar spectrum contributions. We then exploited new synthetic templates that were specifically designed for ultra-hot Jupiters in combination with the cross-correlation technique to unveil species that remained undetected by previous analyses. We add a novel detection of Ba+ to the known atmospheric compositions of WASP-76b and WASP-121b, the heaviest species detected to date in any exoplanetary atmosphere, with additional new detections of Co and Sr+ and a tentative detection of Ti+ for WASP-121b. We also confirm the presence of Ca+, Cr, Fe, H, Li, Mg, Mn, Na, and V on both WASP-76b and WASP-121b, with the addition of Ca, Fe+, and Ni for the latter. Finally, we also confirm the clear asymmetric absorption feature of Ca+ on WASP-121b, with an excess absorption at the bluer wavelengths and an effective planet radius beyond the Roche lobe. This indicates that the signal may arise from the escape of planetary atmosphere. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.06892v1
Detection of barium in the atmospheres of the ultra-hot gas giants WASP-76b and WASP-121b by T. Azevedo Silva et al. on Thursday 13 October High-resolution spectroscopy studies of ultra-hot Jupiters have been key in our understanding of exoplanet atmospheres. Observing into the atmospheres of these giant planets allows for direct constraints on their atmospheric compositions and dynamics while laying the groundwork for new research regarding their formation and evolution environments. Two of the most well-studied ultra-hot Jupiters are WASP-76b and WASP-121b, with multiple detected chemical species and strong signatures of their atmospheric dynamics. We take a new look at these two exceptional ultra-hot Jupiters by reanalyzing the transit observations taken with ESPRESSO at the Very Large Telescope and attempt to detect additional species. To extract the planetary spectra of the two targets, we corrected for the telluric absorption and removed the stellar spectrum contributions. We then exploited new synthetic templates that were specifically designed for ultra-hot Jupiters in combination with the cross-correlation technique to unveil species that remained undetected by previous analyses. We add a novel detection of Ba+ to the known atmospheric compositions of WASP-76b and WASP-121b, the heaviest species detected to date in any exoplanetary atmosphere, with additional new detections of Co and Sr+ and a tentative detection of Ti+ for WASP-121b. We also confirm the presence of Ca+, Cr, Fe, H, Li, Mg, Mn, Na, and V on both WASP-76b and WASP-121b, with the addition of Ca, Fe+, and Ni for the latter. Finally, we also confirm the clear asymmetric absorption feature of Ca+ on WASP-121b, with an excess absorption at the bluer wavelengths and an effective planet radius beyond the Roche lobe. This indicates that the signal may arise from the escape of planetary atmosphere. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.06892v1
VLT, GROND and Danish Telescope observations of transits in the TRAPPIST-1 system by John Southworth et al. on Thursday 22 September TRAPPIST-1 is an ultra-cool dwarf that hosts seven known transiting planets. We present photometry of the system obtained using three telescopes at ESO La Silla (the Danish 1.54-m telescope and the 2.2-m MPI telescope) and Paranal (Unit Telescope 1 of the Very Large Telescope). We obtained 18 light curves from the Danish telescope, eight from the 2.2-m and four from the VLT. From these we measure 25 times of mid-transit for four of the planets (b, c, f, g). These light curves and times of mid-transit will be useful in determining the masses and radii of the planets, which show variations in their transit times due to gravitational interactions. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2207.05874v2
VLT, GROND and Danish Telescope observations of transits in the TRAPPIST-1 system by John Southworth et al. on Thursday 22 September TRAPPIST-1 is an ultra-cool dwarf that hosts seven known transiting planets. We present photometry of the system obtained using three telescopes at ESO La Silla (the Danish 1.54-m telescope and the 2.2-m MPI telescope) and Paranal (Unit Telescope 1 of the Very Large Telescope). We obtained 18 light curves from the Danish telescope, eight from the 2.2-m and four from the VLT. From these we measure 25 times of mid-transit for four of the planets (b, c, f, g). These light curves and times of mid-transit will be useful in determining the masses and radii of the planets, which show variations in their transit times due to gravitational interactions. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2207.05874v2
A MUSE view of the massive merging galaxy cluster ACT-CL J0102-4915 El Gordo at z = 0 87: robust strong lensing model and data release by G. B. Caminha et al. on Wednesday 07 September We present a detailed strong lensing analysis of the massive and distant ($z=0.870$) galaxy cluster ACT-CL J0102$-$4915 (ACT0102, also known as El Gordo), taking advantage of new spectroscopic data from the Multi Unit Spectroscopic Explorer (MUSE) on the Very Large Telescope, and archival imaging from the Hubble Space Telescope. Thanks to the MUSE data, we measure secure redshifts for 374 single objects, including 23 multiply lensed galaxies, and 167 cluster members of ACT0102. The observed positions of 56 multiple images, along with their new spectroscopic redshift measurements, are used as constraints for our strong lensing model. Remarkably, some multiple images are detected out to a large projected distance of $approx 1$ Mpc from the brightest cluster galaxy, allowing us to estimate a projected total mass value of $1.84_{-0.04}^{+0.03} times 10^{15}, rm M_{odot}$ within that radius. We find that we need two extended cluster mass components, the mass contributions from the cluster members and the additional lensing effect of a foreground ($z=0.633$) group of galaxies, to predict the positions of all multiple images with a root mean square offset of $0.75"$. The main cluster-scale mass component is centered very closely to the brightest cluster galaxy and the other extended mass component is located in the north-west region of the cluster. These two mass components have very similar values of mass projected within 300 kpc from their centers, namely $2.29_{-0.10}^{+0.09}times10^{14},rm M_{odot}$ and $2.10_{-0.09}^{+0.08}times10^{14},rm M_{odot}$, in agreement with the major merging scenario of ACT0102. We make publicly available the lens model, including the magnification maps and posterior distributions of the model parameter values, as well as the full spectroscopic catalogue containing all redshift measurements obtained with MUSE. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.02718v1
Sascha Zeegers is an astronomer researching interstellar dust, with Academia Sinica in Taiwan and scientists around the world. ICRT's Trevor Tortomasi chats with Sascha about her upcoming project with the James Webb Space Telescope, or JWST, and how these tiny dust particles throughout our galaxy play an important role in the birth of stars. Thanks for listening!
University of Arizona astronomers have identified five examples of a new class of star system. They're not quite galaxies and only exist in isolation. The new stellar systems contain only young, blue stars, which are distributed in an irregular pattern and seem to exist in surprising isolation from any potential parent galaxy. Mysterious ‘Blue Blobs' Reveal New Star System The stellar systems – which astronomers say appear through a telescope as “blue blobs” and are about the size of tiny dwarf galaxies – are located within the relatively nearby Virgo galaxy cluster. The five systems are separated from any potential parent galaxies by over 300,000 lightyears in some cases, making it challenging to identify their origins. The astronomers found the new systems after another research group, led by the Netherlands Institute for Radio Astronomy's Elizabeth Adams, compiled a catalogue of nearby gas clouds, providing a list of potential sites of new galaxies. Once that catalogue was published, several research groups, including one led by UArizona associate astronomy professor David Sand, started looking for stars that could be associated with those gas clouds. The gas clouds were thought to be associated with our own galaxy, and most of them probably are, but when the first collection of stars, called SECCO1, was discovered, astronomers realized that it was not near the Milky Way at all, but rather in the Virgo cluster, which is much farther away but still very nearby in the scale of the universe. SECCO1 was one of the very unusual “blue blobs,” said Michael Jones, a postdoctoral fellow in the UArizona Steward Observatory and lead author of a study that describes the new stellar systems. Jones presented the findings, which Sand co-authored, during the 240th American Astronomical Society meeting in Pasadena, California, Wednesday. “It's a lesson in the unexpected,” Jones said. “When you're looking for things, you're not necessarily going to find the thing you're looking for, but you might find something else very interesting.” The team obtained their observations from the Hubble Space Telescope, the Very Large Array Telescope in New Mexico and the Very Large Telescope in Chile. Study co-author Michele Bellazzini, with the Istituto Nazionale di Astrofisica in Italy, led the analysis of the data from the Very Large Telescope and has submitted a companion paper focusing on that data. Together, the team learned that most of the stars in each system are very blue and very young and that they contain very little atomic hydrogen gas. This is significant because star formation begins with atomic hydrogen gas, which eventually evolves into dense clouds of molecular hydrogen gas before forming into stars. “We observed that most of the systems lack atomic gas, but that doesn't mean there isn't molecular gas,” Jones said. “In fact, there must be some molecular gas because they are still forming stars. The existence of mostly young stars and little gas signals that these systems must have lost their gas recently.” The combination of blue stars and lack of gas was unexpected, as was a lack of older stars in the systems. Most galaxies have older stars, which astronomers refer to as being “red and dead.” “Stars that are born red are lower mass and therefore live longer than blue stars, which burn fast and die young, so old red stars are usually the last ones left living,” Jones said. “And they're dead because they don't have any more gas with which to form new stars. These blue stars are like an oasis in the desert, basically.” The fact that the new stellar systems are abundant in metals hints at how they might have formed. “To astronomers, metals are any element heavier than helium,” Jones said. “This tells us that these stellar systems formed from gas that was stripped from a big galaxy, because how metals are built up is by many repeated episodes of star formation, and you only really get that in a big galaxy.” Gas stripped from galaxy forming...
Sagittarius A é um buraco negro supermasivo localizado no centro da Via Láctea. É o maior buraco negro conhecido na Via Láctea. Em 2002, uma equipe de cientistas usou o Very Large Telescope para medir a velocidade de rotação do Sagittarius A* e determinou que ele tem um diâmetro de 44 milhões de km, e agora com o anúncio do ESO de longos anos de trabalho, graças ao EHT finalmente temos a primeira foto do que é considerado o buraco negro supermassivo da nossa galáxia! Nos acompanhe também nas redes sociais: Youtube: youtube.com/superfatocanal Instagram: instagram.com/eusuperfato Facebook: fb.com/eusuperfato Twitter: twitter.com/eusuperfato EMAIL PARA CONTATO: comercialsuperfato@gmail.com
Bonjour à tous et bienvenue dans le ZD Tech, le podcast quotidien de la rédaction de ZDNet. Je m'appelle Guillaume Serries et aujourd'hui, je vais vous expliquer comment les circuits photoniques vont utiliser de la lumière, et non plus de l'électricité, dans les cartes cartes mères de vos serveurs. Et peut-être de vos ordinateurs. Nombre d'entre vous connaissent la différence fondamentale entre le bon vieux protocole ADSL et la fibre optique, entre le haut débit et le très haut débit. Oui, dans un cas c'est l'électricité qui transmet l'information, et dans l'autre cas, c'est la lumière. Et voici que cette technique, utiliser la lumière pour transporter de l'information, est en passe de débarquer dans les puces de nos serveurs, et peut-être de nos ordinateurs. Et ce, grâce à des puces dites photoniques. Le but, comme dans le domaine des télécoms, est de déplacer les données sur la carte mère d'une machine beaucoup plus rapidement qu'avec les interconnexions métalliques traditionnelles. L'histoire des circuits intégrés photoniques ou puces optiques a commencé il y a plusieurs dizaines d'années. C'est en septembre 1969 qu'un premier article scientifique évoque le sujet. Mais ensuite, de l'eau va couler sous les ponts. Le pionnier de ce secteur, l'américain Infinera Corporation, commercialise ses premières puces en 2004. Et ce n'est qu'en 2011 que des puces photoniques au débit de 500 Gbits par seconde voient le jour. De là, le marché décolle, porté par les réseaux de fibre optique. Ensuite, ce sont les acteurs du datacenter qui s'emparent de cette technologie. L'augmentation rapide du volume de données pour effectuer des calculs de haute performance ou des calculs d'intelligence artificielle devient insoluble avec les techniques traditionnelles. Concrètement, il n'y a plus assez de bande passante. Ayar Labs, une entreprise qui collabore avec HPE sur le sujet, affirme que sa technologie photonique peut désormais offrir une bande passante 1 000 fois supérieure à celle des circuits électriques tout en consommant 1/10e de la puissance utilisée actuellement. En clair, la transmission de flux de données serait alors de 1 térabit par seconde. Et surtout, les photons ont la particularité de ne pas créer d'interférence magnétique, ni de générer de chaleur. Récemment, Intel a réussi à intégrer une puce photonique dans un serveur. Reste que cette technique est déjà connue dans le monde de la recherche. Des puces photoniques intégrées françaises, conçues à Grenoble, sont par exemple utilisées dans le Very Large Telescope du mont Paranal au Chili. Mais l'utilisation des photons pour transporter de l'information fait également évoluer le matériau utilisé pour fabriquer des puces. L'historique silicium est peu à peu remplacé par le nitrure de silicium. Ce dernier a des propriétés plus intéressantes, notamment en matière de propagation et de coefficient d'absorption.
Gebieden met een droog klimaat zijn vaak duidelijk te herkennen: woenstijnen, steppe, maar hooggelegen droge vlakten als in Mongolië horen hierbij. Wat deze gebieden zo droog houdt bespreken onderzoekers Mark Dekker en René van Westen in deze aflevering van Klimaat van Vandaag. Ze gaan in op de natuurkunde van grote circulaties in de lucht en laten zien waarom de plek van de Very Large Telescope in Chili erg slim gekozen is.CO2 meter (2 januari t/m 8 januari 2022):Dit jaar: 417.43 ppm (+0.48%) Vorig jaar: 415.44 ppmRelevante links:Europese Unie wil gas en kernenergie als groene energiebronnen bestempelenPaper Thomas Gibon over levenscyclusanalyse van diverse energiebronnenKantelpunt in de Amazone? Patroonformatie zorgt voor weerbaarheid.Wat cijfers over de Köppen classificatie (zie tabel 4)Sneeuw in de SaharaIJzer in de oceaan en satellietfoto van planktonbloeiVery Large Telescope in Chili Reageren? Mail naar klimaatvanvandaag@gmail.com. Je kunt ons ook vinden op Instagram en Twitter.
ESO's Very Large Telescope has captured an image of a planet orbiting b Centauri, a pair of stars that can be seen with the naked eye. Find out why this next-door planetary system is extreme in this short video.
ESO's Very Large Telescope has captured an image of a planet orbiting b Centauri, a pair of stars that can be seen with the naked eye. Find out why this next-door planetary system is extreme in this short video.
Using the ESO's Very Large Telescope, astronomers have revealed the closest pair of supermassive black holes to Earth ever observed. This video summarises the discovery.
Using the ESO's Very Large Telescope, astronomers have revealed the closest pair of supermassive black holes to Earth ever observed. This video summarises the discovery.
Pour la première fois, un trou noir stellaire a été détecté dans un jeune amas d'étoiles, et qui plus est en dehors de notre galaxie, dans le Grand Nuage de Magellan. Il a été détecté grâce aux mouvements d'une étoile compagne grâce au Very Large Telescope de l'ESO. L'étude est publiée dans les Monthly Notices of the Royal Astronomical Society.
Astronomers have used the ESO's Very Large Telescope in Chile to image 42 of the biggest main-belt asteroids. Meet some of the 42 in this video summarising the discovery!
Astronomers have used the ESO's Very Large Telescope in Chile to image 42 of the biggest main-belt asteroids. Meet some of the 42 in this video summarising the discovery!
The 365 Days of Astronomy, the daily podcast of the International Year of Astronomy 2009
Using data from the Hubble Telescope and the ESO's Very Large Telescope in Chile, a team of scientists have successfully detected clouds on an exoplanet and even measured their altitude. Plus, fossil evidence of humans' arrival in North America and a review of the first episode of “Foundation” on Apple TV+. 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://astrogear.spreadshirt.com/ 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 Astrosphere New Media. http://www.astrosphere.org/ Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.
In a gloriously international Episode XXIX (29) we go full-on to Germany for Oktoberfest and show you where to shop and the cool ageless German couple invading our Insta. While there let's stay at the best hotel in old town, and go to one of the coolest department stores on the planet you don't know about...LODENFREY. It's 10 days to Unterscharfuehrer Dan Andrews' Countdown to Freedom and he better be prepared for a blitzkrieg if he fails to honour a promise. Fantastic Actor/Model/Patriot/Hollywood standout Antonio Sabato, Jr was riding high in Hollywood until one day when he shared his political beliefs, and everything dried up overnight. Explore the Hollywood Leftist Hypocrisy that makes the Communist Blacklist look like a kid's birthday party and hear how this mensch has rebuilt from scratch with a powerful new book and amazing new movie and brand new studio to buck the system in a brilliant, revealing INTERVIEW. There is a big ass telescope that is called the Very Large Telescope and it's revealed to me everything you need to know about the Earth and your future. SuperJap KENZO has passed at 81, and his legendary work is remembered as we see if the King of Elwood had anything to do with his demise. Back to the past we run over a dog in Sioux City en route to Leif Erikson pool, and learn if you can tell a friend they have halitosis. :) PLUS ALL YOUR REGULAR FAVES! #Oktoberfest #antonioSabatoJr #SabatoTheUntoldStory #LeifEriksonPoolSiouxCity #siouxCity #JaggerCates #GeneralHospital #TheBigHit #LouDiamondPhillips #MarkWahlberg #aliciaSilverstone #DuneMovie #BondMovieDelay #LASlakers #ScienceDaily #MarcoMignoli #VLT #DanialD'Addario #Variety #TheTimesBonn #JohnVicocur #Lodenfrey #DanBongino #PaulRegan #Kenzo #JacquesMarieMage #Opsf #GuntherKrabbenhoft #BrittKanja #MartaPR www.amazon.com/Sabato-Untold-Story-Antonio-Jr/dp/B08FP9XBW8