Podcasts about astrophysical journal letters

Recently Dr. Yossi Shvartzvald led a team which published their discovery of an Earth sized planet using microlensing in the Astrophysical Journal Letters. The newly discovered planet OGLE-2016-BLG-1195Lb orbits a small dim object about 13,000 light years from us. With only 7.8% of the Sun's mass the new planet's star may be a brown dwarf and not a star at all. At about the same distance from its star as we are from the Sun this new planet is likely to be an ice ball world colder than Pluto.

The beginnings of our end — where the anus came from Our distant evolutionary ancestors had no anuses. Their waste was excreted from the same orifice they used to ingest food, much like jellyfish do today. Now a new study on bioRxiv that has yet to be peer-reviewed, scientists think they've found the evolutionary link in a worm with only a single digestive hole. Andreas Hejnol, from Friedrich Schiller University Jena, said he found genes we now associate with the anus being expressed in the worms in the opening where its sperm comes out, suggesting that in our evolutionary history a similar orifice was co-opted as a butt hole. Deepfake videos are becoming so real, spotting them is becoming increasingly diceyDetecting deepfake videos generated by artificial intelligence is a problem that's getting progressively worse as the technology continues to improve. One way we used to be able to tell the difference between a fake and real video is that subtle signals revealing a person's heart rate don't exist in artificially generated videos. But that is no longer the case, according to a new study in the journal Frontiers in Imaging. Peter Eisert, from Humboldt University and the Fraunhofer Heinrich-Hertz-Institute HHI in Germany, said detecting manipulated content visually is only going to become a lot more difficult going forward. Crows can use tools, do math — and now apparently understand geometryCrows are known to be among the most intelligent of animals, and a new study has explored their geometrical sophistication. Researchers including Andreas Nieder from the University of Tübingen found that crows can recognize and distinguish different kinds of quadrilateral shapes, an ability we had thought was unique to humans. The research was published in the journal Science Advances.There's gold in them thar magnetically charged neutron stars!Astronomers have discovered a new source of the universe's heavy elements — things like gold, platinum and uranium. A study led by astrophysicist Anirudh Patel found that magnetars — exotic neutron stars with ultra-powerful magnetic fields — may produce these elements in a process analogous to the way solar flares are produced by our Sun. The research, published in The Astrophysical Journal Letters, found that a single flare from a magnetar could produce the mass equivalent of 27 moons' worth of these heavy elements in one burst.It may not be big, but it's small — and stroppyYou might not expect an insect so tiny you need a magnifying glass to see it properly to be an aggressive defender of its territory, but that's because you haven't met the warty birch caterpillar. Its territory is just the tip of a birch leaf, but it defends it by threatening intruders with vigorous, if not precisely powerful, vibrations. Jayne Yack at Carleton University has been studying this caterpillar since 2008. This research was published in the Journal of Experimental Biology.Criminals beware — the microbiome leaves fingerprintsScientists have developed a new tool that can track location based on traces of the bacteria characteristic to different places. Eran Elhaik, from Lund University in Sweden, trained the AI tool using nearly 4,500 microbiome samples collected around the world from subway systems, soil and the oceans. He said they could identify the city source in 92 per cent of their urban samples, and in Hong Kong, where a lot of their data came from, they could identify the specific subway station samples were taken from with 82 per cent accuracy. The study was published in the journal Genome Biology and Evolution.

Something really weird happened out in space, and astronomers are totally baffled. A strange cosmic explosion lit up the sky, and it might be a super-rare event where everything lined up perfectly — or it could be something completely new that no one's ever seen before! It's called EP240408a, and it was first spotted by the Einstein Probe, an X-ray space telescope, on April 8, 2024. At first, it looked like your typical gamma-ray burst, which usually blasts out insanely bright X-rays. But the more scientists looked, the more things didn't add up. Now everyone's wondering if we just witnessed something brand new in the universe! Credit: CC BY-SA 4.0 https://creativecommons.org/licenses/... Gemini South: by International Gemini Observatory/NOIRLab/NSF/AURA/M. Paredes, https://noirlab.edu/public/images/noi..., https://commons.wikimedia.org/wiki/Fi... Blue Optical Transient: by NASA, ESA/Hubble, STScI, A. Chrimes (Radboud University), https://esahubble.org/images/heic2309c/, https://commons.wikimedia.org/wiki/Fi... Sirius: by Pablo Carlos Budassi, https://commons.wikimedia.org/wiki/Fi... Tde-simulation: by Danieljamesprice, https://commons.wikimedia.org/wiki/Fi... Survey camera: by DOE/FNAL/DECam/R. Hahn/CTIO/NOIRLab/NSF/AURA, https://noirlab.edu/public/images/noi..., https://commons.wikimedia.org/wiki/Fi... CC BY 3.0 https://creativecommons.org/licenses/... Einstein Probe: by China News Service, https://commons.wikimedia.org/wiki/Fi... Antennas at Narrabri: by John Masterson, CSIRO, https://commons.wikimedia.org/wiki/Fi... FBOTvsGRBvsSN: by Bill Saxton, NRAO/AUI/NSF, https://public.nrao.edu/news/new-clas..., https://commons.wikimedia.org/wiki/Fi... telesopes near Datil: by Murray Foubister, CC BY-SA 2.0 https://creativecommons.org/licenses/..., https://commons.wikimedia.org/wiki/Fi... Einstein Probe Transient: by The Astrophysical Journal Letters, https://iopscience.iop.org/article/10... What Are Gamma-ray Bursts?: by NASA's Goddard Space Flight Center, https://svs.gsfc.nasa.gov/14738#media... Wavelengths of Light: by NASA, ESA, CSA, Leah Hustak (STScI), https://webbtelescope.org/contents/me... Black Hole Accretion: by NASA's Goddard Space Flight Center/Jeremy Schnittman, https://svs.gsfc.nasa.gov/13326#media... Isolated Black Hole: by NASA/JPL-Caltech/R. Hurt (IPAC), https://svs.gsfc.nasa.gov/14620#media... Black Hole Devouring A Star: by NASA/Goddard Space Flight Center/CI Lab, https://svs.gsfc.nasa.gov/10807/#medi... Animation is created by Bright Side. ---------------------------------------------------------------------------------------- Music from TheSoul Sound: https://thesoul-sound.com/ Check our Bright Side podcast on Spotify and leave a positive review! https://open.spotify.com/show/0hUkPxD... Subscribe to Bright Side: https://goo.gl/rQTJZz ---------------------------------------------------------------------------------------- Our Social Media: Facebook:   / brightplanet   Instagram:   / brightside.official   TikTok: https://www.tiktok.com/@brightside.of... Stock materials (photos, footages and other): https://www.depositphotos.com https://www.shutterstock.com https://www.eastnews.ru ---------------------------------------------------------------------------------------- For more videos and articles visit: http://www.brightside.me ---------------------------------------------------------------------------------------- This video is made for entertainment purposes. We do not make any warranties about the completeness, safety and reliability. Any action you take upon the information in this video is strictly at your own risk, and we will not be liable for any damages or losses. It is the viewer's responsibility to use judgement, care and precaution if you plan to replicate. Learn more about your ad choices. Visit megaphone.fm/adchoices

TEMPORADA 31 DE LA LUZ DEL MISTERIO Vive el Misterio... Pasa, ponte cómodo y disfruta... FROM LONDON: Una experiencia única de comunicación de La Luz del Misterio esta seamana, nos llevará conocer mejor la noticia que ha surgido desde aquí, en Reino Unido sobre los científicos han detectado “pruebas contundentes” de vida extraterrestre en un planeta lejano. Un grupo de científicos detectaron una señal alentadora de posible vida en un planeta fuera de nuestro sistema solar, a la que describen como la “prueba más contundente” hasta ahora de la existencia de vida más allá de la Tierra. El estudio, que podría marcar un antes y un después en la búsqueda de vida fuera de la Tierra, fue publicado este miércoles en la revista Astrophysical Journal Letters. Luego vamos a responder a algunas preguntas sobre el celebre apostol que traicionó a Jesús, según las sagradas escrituras: ¿Por qué Judas traicionó a Jesús? ¿Fue realmente un traidor o una pieza clave en un plan divino que trascendía su comprensión? ¿Podemos considerar su acto un paso necesario para la redención de la humanidad? ¿O se trata más bien de un enigma que nunca se podrá resolver? Con la ayuda de Óscar Fábrega, historiador especializado en los misterios del cristianismo, nos adentraresmos en los enigmas que rodean al discípulo más controvertido de Jesús de Nazaret. El último libro de Óscar Fábrega, Judas, el Iscariote.Tras el beso del traidor, realiza un análisis profundo y accesible, cuestiona las narrativas tradicionales evangélicas y revisaremos con él fuentes tanto canónicas como apócrifas, a través de un profundo trabajo exegético, explorando las distintas caras de Judas Iscariote: desde el codicioso poseído por Satanás hasta el instrumento indispensable de un propósito superior. ¿Fue Judas el villano que nos pintaron o, quizá, un hombre atrapado en un destino inevitable. Además, recorreremos las leyendas, interpretaciones artísticas y literarias, así como diversas tradiciones culturales, que han moldeado su figura a lo largo de los siglos, revelando cómo su imagen ha evolucionado para convertirse en un símbolo universal de traición, pero también de duda y redención. De la mano de Óscar Fábrega, comprobaremos que esta compleja historia ejemplifica como pocas los problemas que debe superar todo aquel que se proponga averiguar qué hay de verdad en las narraciones evangélicas. ——————————————————— Síguenos a través de: edenex.es ZTR Radio.online London Radio World En Ivoox Itunes Spotify Amazon YouTube Si deseas apoyarnos: https://www.ivoox.com/ajx-apoyar_i1_support_29070_1.html Más información: laluzdelmisterioradio.blogspot.com laluzdelmisterio@gmail.com

TEMPORADA 31 DE LA LUZ DEL MISTERIO Vive el Misterio... Pasa, ponte cómodo y disfruta... FROM LONDON: Una experiencia única de comunicación de La Luz del Misterio esta seamana, nos llevará conocer mejor la noticia que ha surgido desde aquí, en Reino Unido sobre los científicos han detectado “pruebas contundentes” de vida extraterrestre en un planeta lejano. Un grupo de científicos detectaron una señal alentadora de posible vida en un planeta fuera de nuestro sistema solar, a la que describen como la “prueba más contundente” hasta ahora de la existencia de vida más allá de la Tierra. El estudio, que podría marcar un antes y un después en la búsqueda de vida fuera de la Tierra, fue publicado este miércoles en la revista Astrophysical Journal Letters. Luego vamos a responder a algunas preguntas sobre el celebre apostol que traicionó a Jesús, según las sagradas escrituras: ¿Por qué Judas traicionó a Jesús? ¿Fue realmente un traidor o una pieza clave en un plan divino que trascendía su comprensión? ¿Podemos considerar su acto un paso necesario para la redención de la humanidad? ¿O se trata más bien de un enigma que nunca se podrá resolver? Con la ayuda de Óscar Fábrega, historiador especializado en los misterios del cristianismo, nos adentraresmos en los enigmas que rodean al discípulo más controvertido de Jesús de Nazaret. El último libro de Óscar Fábrega, Judas, el Iscariote.Tras el beso del traidor, realiza un análisis profundo y accesible, cuestiona las narrativas tradicionales evangélicas y revisaremos con él fuentes tanto canónicas como apócrifas, a través de un profundo trabajo exegético, explorando las distintas caras de Judas Iscariote: desde el codicioso poseído por Satanás hasta el instrumento indispensable de un propósito superior. ¿Fue Judas el villano que nos pintaron o, quizá, un hombre atrapado en un destino inevitable. Además, recorreremos las leyendas, interpretaciones artísticas y literarias, así como diversas tradiciones culturales, que han moldeado su figura a lo largo de los siglos, revelando cómo su imagen ha evolucionado para convertirse en un símbolo universal de traición, pero también de duda y redención. De la mano de Óscar Fábrega, comprobaremos que esta compleja historia ejemplifica como pocas los problemas que debe superar todo aquel que se proponga averiguar qué hay de verdad en las narraciones evangélicas. ——————————————————— Síguenos a través de: edenex.es ZTR Radio.online London Radio World En Ivoox Itunes Spotify Amazon YouTube Si deseas apoyarnos: https://www.ivoox.com/ajx-apoyar_i1_support_29070_1.html Más información: laluzdelmisterioradio.blogspot.com laluzdelmisterio@gmail.com

Astronomers believe they have discovered the strongest evidence yet that life may exist on a planet outside our solar system.A group of scientists, led by the University of Cambridge, have published the results of their study in the Astrophysical Journal Letters.One of the co-authors is Dr Subhajit Sarkar, a lecturer and astrophysicist at Cardiff University, and he joins us to explain more about the planet K2-18b, why the team were looking specifically at that part of space and why he thinks it's only a matter of time before we can confirm alien life.Plus, with the long Easter weekend upon us, The Standard's Food and Drink writer, Josh Barrie, is on hand with ideas of what to do and where to go in the capital to keep the family entertained. Hosted on Acast. See acast.com/privacy for more information.

En Abril de 2020 ocurrió algo excepcional. Se detectó el primer FRB dentro de nuestra galaxia, y no a cientos o miles de millones de años luz de distancia, como sucedía con todos los anteriores. Lo que permitió rastrearlo hasta un magnetar, un extraño tipo de cadáver estelar , llamado SGR 1935 + 2154 . El estallido, detectado por varios radiotelescopios de todo el mundo, fue tan poderoso que los instrumentos ni siquiera consiguieron medir su intensidad. La señal, según los investigadores, fue por lo menos un millón de veces más fuerte que el resto de los FRBs detectados hasta el momento, y la primera detectada dentro de la Vía Láctea. Tras largos meses de análisis, un nuevo estudio recién publicado en The Astrophysical Journal Letters confirma que el FRB procede, efectivamente, del magnetar SGR 1935 + 2154, un "cadáver estelar" que se encuentra a unos 30.000 años luz , dentro de nuestra propia galaxia. Lo cual llevó a pensar que también otros FRB podrían tener un origen similar.

What can the history of science tell us about the world we live in today and where we might be headed tomorrow? To find out, Dr. Charles Liu and co-host Allen Liu welcome historian of science Rebecca Charbonneau, PhD from the American Institute of Physics and the National Radio Astronomy Observatory with expertise in radio astronomy and the search for extraterrestrial intelligence (SETI). This episode kicks off with Allen and Chuck talking about January's Lunar Occultation of Mars. You can see a photo taken by Chuck on our YouTube Community tab. And then it's time for today's joyfully cool cosmic thing: a recent paper in the Astrophysical Journal Letters confirming there are galaxies that were fully formed just 400 million years after The Big Bang. Chuck, who studies galactic evolution, tells us why this changes our understanding of galaxy formation. Rebecca talks about how new ideas can be controversial and how personalities, politics and cultures can impact the evolution of science. She brings up the current controversy in astronomy concerning the locations of terrestrial telescopes and the tension between scientific and cultural imperatives. She also recounts seeing people in Russia wearing NASA t-shirts and explains how NASA understood the importance of controlling the narrative, even inviting Norman Rockwell to popularize the space program. Our first question comes from Pablo P. on Patreon, who asks, “Can humanity be destroyed by AI powered by quantum computing?” Rebecca explains how during the Cold War, scientists on both sides engaged in “science diplomacy” that helped lower tensions. She applies this thinking to AI, pointing out that while a “Terminator-like” scenario is unlikely, public concern is causing the tech world to confront and grapple with real threats from AI like biases in hiring algorithms. Allen, a mathematician who writes about AI professionally, addresses whether AI powered by quantum computing is more dangerous than AI in general. Rebecca shares the terrifying story of a Soviet nuclear submarine and the US navy during the Cuban Missile Crisis that nearly started a nuclear war. The dissenting actions of a single officer named Vasily Arkhipov made the difference, and she wonders if AI would have made the same decision based on the available data. For our next question, we return to our Pablo P. from Patreon for his follow up: “How [do] we answer the question about whether or not we are engaging in self-destructive behavior?” Chuck and Rebecca discuss the confluence of astronomy and the military, and how the history of the SETI program highlights their shared concerns. You'll find out what the Drake Equation has to do with concepts like The Great Filter. Science, she reminds us, is a tool to try to get closer to the truth, but it's not always perfect in pointing out whether what we're doing is safe or potentially self-destructive. Then we turn to Rebecca's other big passion, art history and the window into the human experience that art provides. Charles brings up The Scream by Edvard Munch and the fact that it's actually a depiction of a real atmospheric event. Rebecca talks the use of fractal studies to determine the authenticity of Jackson Pollock art. She also explores the artistic value of scientific artifacts like the controversial plaque attached to Pioneer 10 depicting a naked man and woman, and the interstellar Arecibo Message, sent by Frank Drake in 1974. You'll even hear how Frank worked himself into the message and what that has to do with Albrecht Durer's self-portrait painted in the year 1500. Finally, we turn to what Rebecca's been up to recently. Her new book Mixed Signals came out in January of this year. Keep up with her on her website at and follow her on X @rebecca_charbon and on BlueSky @rebeccacharbon.bsky.social. We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon. Credits for Images Used in this Episode: A young Milky Way-like galaxy and a background quasar 12 billion and 12.5 billion light-years away, respectively. – Credit: ALMA (ESO/NAOJ/NRAO), M. Neeleman & J. Xavier Prochaska; Keck Observatory Artist's concept of a high red-shift galaxy. – Credit: Alexandra Angelich (NRAO/AUI/NSF) John Young and Gus Grissom are suited for the first Gemini flight March 1965. Norman Rockwell, 1965. – Credit: Smithsonian National Air and Space Museum / Norman Rockwell Edvard Munch, 1893, The Scream. – Credit: Edvard Munch / National Gallery of Norway (Public Domain) Fractal study of Jackson Pollock art. – Credit: “Perceptual and physiological responses to Jackson Pollock's fractals,” R. Taylor, et al, Front. Hum. Neurosci., 21 June 2011. The Arecibo message. – Credit: Creative Commons NASA image of Pioneer 10's famed Pioneer plaque. – Credit: NASA Albrecht Durer self-portrait. – Credit: Albrecht Dürer - Alte Pinakothek (Public Domain)

Des astrophysiciens ont découvert avec le télescope Webb que le trou noir supermassif central de notre galaxie, Sgr A*, émettait constamment des éruptions visibles en infra-rouge, sans période de repos, via le disque d'accrétion qui l'entoure. Des éruptions courtes et faibles et des éruptions longues et brillantes semblent être générées par des processus distincts. Ils publient leur découverte dans The Astrophysical Journal Letters. Source Nonstop Variability of Sgr A* Using JWST at 2.1 and 4.8 μm Wavelengths: Evidence for Distinct Populations of Faint and Bright Variable EmissionF. Yusef-Zadeh, et al.The Astrophysical Journal Letters, Volume 980, Number 2 (18 february 2025)https://doi.org/10.3847/2041-8213/ada88b Illustrations Les variations d'intensité du signal infra-rouge émanant de Sgr A* (F. Yusef-Zadeh, et al.) Images en infra-rouge reconstituées des éruptions de Sgr A* ((F. Yusef-Zadeh, et al.) Fahrad. Yusef-Zadeh

Des chercheurs ont trouvé pour la première fois la preuve que même les microquasars contenant une étoile de faible masse sont des accélérateurs de particules efficaces, ce qui a un impact significatif sur l'interprétation de l'abondance des rayons gamma dans notre galaxie et au-delà. Ils publient leur étude dans The Astrophysical Journal Letters. Source Persistent GeV Counterpart to the Microquasar GRS 1915+105Guillem Martí-Devesa and Laura Olivera-NietoThe Astrophysical Journal Letters, Volume 979, Number 2 (28 january 2025)https://doi.org/10.3847/2041-8213/ada14f Illustrations Vue d'artiste d'un microquasar (NASA) Le spectre des rayons cosmiques, la première cassure, le genou (knee) se situe à environ 4 PeV (4. 106 GeV) (Blümer et al.) Guillem Martí-Devesa

Une équipe d'astrophysiciens a calculé l'impact de la supernova qui a eu lieu à proximité de la Terre il y a 2,5 millions d'années et dont on observe toujours aujourd'hui les traces dans le spectre du rayonnement cosmique et dans les dépôts de fer radioactif dans la croûte terrestre. La dose de radiations a été suffisamment importante et sur une longue durée pour avoir un effet mutagène non négligeable sur les organismes vivants. Ils publient leur étude dans The Astrophysical Journal Letters. Source Life in the Bubble: How a Nearby Supernova Left Ephemeral Footprints on the Cosmic-Ray Spectrum and Indelible Imprints on LifeCaitlyn Nojiri et al.The Astrophysical Journal Letters, Volume 979, Number 1 (17 january 2025)https://doi.org/10.3847/2041-8213/ada27a Illustrations Diagramme donnant la dose reçue sur Terre par an entre 10000 et 100000 ans après l'explosion de supernova en fonction de la distance de la supernova pour différentes valeurs des paramètres du modèle (Caitlyn Nojiri et al.) Caitlyn Nojiri

SpaceTime Series 28 Episode 10Gaia's Sky Scanning Completion and Mid Infrared Flare from Sagittarius A*The European Space Agency's Gaia spacecraft has completed its sky scanning phase, marking a monumental achievement in astronomical missions. Over the past decade, Gaia has transformed our understanding of the Milky Way by mapping the positions and characteristics of billions of stars. This mission has provided unprecedented insights into the origins and evolution of our galaxy, revealing its structure and history like never before.Mid Infrared Flare from the Milky Way's Supermassive Black HoleAstronomers have detected a mid infrared flare from Sagittarius A*, the supermassive black hole at the center of the Milky Way. This discovery, made using NASA's Webb Space Telescope, fills a crucial gap in our understanding of black hole flares and supports existing models of magnetic reconnection in the accretion disk surrounding the black hole.Discovery of a New Type of ExoplanetNASA's Webb Space Telescope has unveiled a new type of exoplanet, unlike anything in our solar system. The planet, GJ1214B, exhibits a carbon dioxide-rich atmosphere similar to Venus, challenging previous assumptions about exoplanet atmospheres and providing new insights into planetary formation.00:00 This is space time series 28 episode 10 for broadcast of 22 January 202500:49 European Space Agency's Gaia spacecraft has completed its 10th science mission05:22 First ever detection of mid infrared flare from Milky Way's supermassive black hole11:15 NASA's Webb Space Telescope has discovered a new type of planet14:11 New study suggests eating carrots can improve the treatment of type 2 diabetes17:41 Tesla is launching satellite connectivity for regular mobile phones in Australiawww.spacetimewithstuartgary.comwww.bitesz.com

Il y a quelques mois, la collaboration DESI (Dark Energy Spectroscopic Instrument) a mesuré une relation étroite entre la constante de Hubble-Lemaître (H0) et la distance à l'amas de galaxies de Coma, en utilisant la relation dite du plan fondamental (FP) sur l'échantillon le plus profond et le plus homogène de galaxies de type précoce. A partir de cette relation indépendante du modèle cosmologique, on peut déterminer une valeur de H0 si on mesure la distance de l'amas de Coma. Inversement, en considérant une certaine valeur de H0, on peut en déduire la distance de l'amas et la comparer avec des valeurs obtenues autrement, de quoi tester la tension existante sur la constante de Hubble-Lemaître. Une équipe d'astrophysiciens vient de faire ce test en mesurant pour la première fois la distance de l'amas de Coma grâce à 13 supernovas de type Ia, des chandelles standard. La distance qu'ils obtiennent mène à une valeur de H0 de 76,5 ± 2,2 km s-1.Mpc-1, renforçant encore la tension sur le taux d'expansion actuel de l'Univers, et le besoin de réviser le modèle standard. Source The Hubble Tension in Our Own Backyard: DESI and the Nearness of the Coma ClusterDaniel Scolnic et al.The Astrophysical Journal Letters, Volume 979, Number 1 (15 january 2025)http://doi.org/10.3847/2041-8213/ada0bd Illustration Localisation des supernovas utilisées dans l'amas de Coma Daniel Scolnic

Ancient human ancestors didn't eat meat, and so couldn't build big brainsOne of the main reasons scientists think we became so smart is because at some point in our evolutionary past, our ancestors started eating energy-dense meat to fuel the growth of large brains. However it hasn't been clear when this started. Using a new technology, scientists were able to analyze the tooth enamel of seven 3.5 million year old Australopithecines to directly measure their meat consumption. Tina Lüdecke, from the Max Planck Institute for Chemistry, said it revealed they were primarily herbivores so meat eating would have had to come later in our evolutionary history. Their study was published in the journal Science. Building a robot bee that could one day pollinate cropsBees do an incredibly important job pollinating crops and wild plants. Now scientists in the US are trying to emulate their skills with a tiny robot bee that has all the agility and ability of the real insect. They hope eventually they can be used in indoor factory farms where real bees can't survive.  Kevin Chen, associate professor of Electrical Engineering and Computer Science at M.I.T and PhD candidate Suhan Kim were a part of this project. Their research was published in the journal Science Robotics.We are made of star stuff – but how did it get here?Elements like carbon, nitrogen and oxygen that are essential to life were forged in supernovae billions of years ago. Now new research is helping to explain how these elements – especially essential carbon – were concentrated in such a way as to be plentifully available for the chemistry of life. The study, led in part by astronomer Trystyn Berg, discovered a cosmic conveyer belt funneling carbon in and out of our galaxy over billions of years. The research was published in the Astrophysical Journal Letters.Australia's vanishingly rare marsupial mole gets a genetic checkupIn the southern desert of Australia, there lives an elusive and unique animal - the marsupial mole. It lives under the sand and is so rare that very few people have ever seen it. Scientists have now published the very first genetic research on this animal in the journal Science Advances, thanks to tissue samples donated by a local museum. Sarah Lucas is a postdoctoral research associate at the University of Münster, Germany, and was part of the team. A climate researcher makes the case for scientist-activistsThe stereotype of a scientist is a dispassionate, objective and neutral seeker of nature's truths, and many think that this makes a career in science incompatible with political activism. Canadian climate scientist Katherine Hayhoe thinks that this is a mistake. She sees her role more like that of a physician for the planet – diagnosing its ills and advocating for the health of her patient, and her patient's inhabitants. She recently co-authored a paper in the journal Nature Climate Action arguing her case.

SpaceTime Series 28 Episode 07Dark Matter's Role in Milky Way's Stellar StreamsNew research suggests that dark matter may have influenced the formation of the GD-1 stellar stream in the Milky Way. A study in the Astrophysical Journal Letters proposes that a core-collapsing, self-interacting dark matter subhalo could explain the unusual spur and gap features observed in the stream. This finding could deepen our understanding of dark matter's properties and its influence on the universe.Sun's Triple Solar Flare EruptionThe Sun has unleashed three significant X-class solar flares in a single day, with the first and third being X1.1 flares and the second an X1.5. These powerful eruptions, detected by NOAA's Solar Ultraviolet Imager, are part of the Sun's approach to solar maximum, the peak of its 11-year solar cycle. Solar flares can disrupt Earth's communications, power grids, and pose health risks to astronauts.Quadrantids Meteor Shower SpectacleThe Earth is experiencing the Quadrantids meteor shower, offering a dazzling display of shooting stars. Originating from the near-Earth asteroid 2003 EH1, the Quadrantids are best viewed from dark locations, with peak sightings expected in the Pacific region. Sky watchers can anticipate around 50 meteors per hour, with potential fireballs enhancing the spectacle.00:00 This is space time series 28 episode 7 for broadcast on 15 January 202500:46 New research proposes a self interacting dark matter subhalo could explain GD1 features04:24 The sun unleashed three significant X class solar flares on the same day07:19 Earth is experiencing one of its most spectacular meteor showers, the Quadrantids14:31 A quarter of the world's freshwater animals are at risk of extinction16:43 Facebook boss Mark Zuckerberg admits that his fact checkers are dishonest20:28 CES has wrapped up in Las Vegas with lots of interesting gadgetswww.spacetimewithstuartgary.comwww.bitesz.com

SpaceTime Series 27 Episode 155*Discovery of a New Class of Cosmic X-RayAstronomers have identified a new class of cosmic X-ray source, potentially originating from a novel type of nova event. The study, published in the Astrophysical Journal Letters, reveals 29 unusual objects in the Large and Small Magellanic Clouds. These objects displayed unexpected behaviours, such as long-duration X-ray outbursts and recurring outbreaks. The findings suggest these sources, dubbed 'Milli Novae', could play a crucial role in understanding astrophysical phenomena, especially as they may contribute to the mass of white dwarfs, potentially leading to Type 1A supernovae.*Uncovering the Secrets of the CentaursUsing the James Webb Space Telescope, astronomers have begun studying centaurs, a unique family of comet-like asteroids orbiting between Jupiter and Neptune. The study of 2060 Chiron reveals surface chemistry unlike any other known centaur, with carbon dioxide and carbon monoxide ices, and methane gases in its coma. These findings provide new insights into the origins of our solar system, as centaurs have remained largely unchanged since its formation 4.6 billion years ago.*NASA's Plans for Commercial Space StationsWith the International Space Station set for retirement in 2030, NASA is supporting the development of multiple commercial space stations. Projects include the NASA-funded STAR Labs space station, slated for launch in 2028, and Axiom's modular space station, which will initially dock with the ISS. Other proposals, like Orbital Reef and Haven One, are also in development, promising to advance commercial space activities and research.00:00 Astronomers have identified a new class of cosmic X ray source04:44 2060 Chiron provides new clues about the origins of our solar system12:56 A number of proposals for commercial low Earth orbit space stations are growing17:46 Higher levels of air pollution associated with higher risk of hospitalisation, study finds19:31 Almost all artificial intelligence chatbots are showing symptoms of mild cognitive impairment20:47 Apple's AI summarisation feature sometimes gives incorrect summaries22:47 ChatGPT has made its search engines free24:17 Space Time is available every Monday, Wednesday and Friday through Apple Podcastswww.spacetimewithstuartgary.comwww.bitesz.com

Des astrophysiciens ont trouvé une explication plausible pour un type de signal radio répétitif de longue période identifié pour la première fois il y a deux ans, mais qui apparaît désormais à de nombreux endroits dans le ciel. Ils ont identifié un tel signal périodique qu'ils ont pu clairement associer à une étoile naine rouge. Mais elle ne serait pas seule... C'est son interaction avec une naine blanche qui serait à l'origine du signal radio détecté. L'étude est publiée dans The Astrophysical Journal Letters. Source A 2.9 hr Periodic Radio Transient with an Optical CounterpartN. Hurley-Walker et al.The Astrophysical Journal Letters, Volume 976, Number 2 (26 november 2024)https://doi.org/10.3847/2041-8213/ad890e

Une équipe de planétologues a observé la planète naine Makémaké avec le télescope Webb et ont découvert un excès très important dans l'infrarouge moyen. L'excès détecté indique des températures d'environ 150 K, bien supérieures à celles que les surfaces solides à la distance héliocentrique de Makémaké pourraient atteindre par irradiation solaire. Pour les chercheurs, qui publient leur découverte dans The Astrophysical Journal Letters, cela indique que Makémaké est active, ou bien qu'elle possède un anneau de poussière carbonée... Les deux scénarios indiquent des phénomènes sans précédent parmi les objets transneptuniens, et pourraient avoir un impact considérable sur notre compréhension de ces mondes lointains. Source Prominent Mid-infrared Excess of the Dwarf Planet (136472) Makemake Discovered by JWST/MIRI Indicates Ongoing ActivityCsaba Kiss et al.The Astrophysical Journal Letters, Volume 976, Number 1 (14 november 2024)https://doi.org/10.3847/2041-8213/ad8dcb Illustrations Vue d'artiste de Makémaké NASA, ESA, A. Parker and M. Buie (Southwest Research Institute), W. Grundy (Lowell Observatory), and K. Noll (NASA GSFC) Ajustement du spectre IR par l'ajout de l'effet d'un point chaud à la surface de Makémaké avec différentes caractéristiques (Kiss et al.) Ajustement du spectre IR par l'ajout de différents types de poussière sous forme d'anneaux (Kiss et al.)

SpaceTime Series 27 Episode 131*Ultra High Energy Gamma Rays Detected in the Milky Way's CoreScientists have detected ultra high energy gamma rays emanating from the centre of the Milky Way. This discovery, reported in the Astrophysical Journal Letters, offers a new perspective on the violent phenomena occurring in the galactic core. Using the High Altitude Water Cherenkov Observatory in Mexico, researchers measured these gamma rays at over 100 tera electron volts, providing insights into the cosmic processes involving Sagittarius A, the galaxy's central supermassive black hole.*Discovery of a Potential Triple Black Hole SystemAstronomers have identified what may be the first triple black hole system, located 8,000 light years away. This discovery could be the first direct evidence of gentle black hole formation, challenging the typical violent supernova origin theory. The system includes a central black hole, a closely orbiting star, and a far-off companion star, suggesting a more subtle formation process known as direct collapse.*NASA's New Deployable Solar Array System Faces ChallengesNASA has encountered issues with its new deployable solar array and antenna system on the Pathfinder Technology Demonstrator 4 spacecraft. The lightweight integrated solar array and antenna system, designed to enhance power and communication capabilities, is not deploying correctly due to a bent boom. This technology aims to support future deep Space missions with improved efficiency.The Science RobertA recent study reveals that standing, as opposed to sitting, does not improve cardiovascular health, despite the popularity of standing desks. Fossilised remains of a new giant elephant species have been found in India's Kashmir Valley, shedding light on elephant evolution. AI-assisted colonoscopies show a slight improvement in polyp detection. Meanwhile, Apple releases its first AI update, focusing on privacy and user data protection.www.spacetimewithstuartgary.comwww.bitesz.com

En septembre 2021, je vous racontais la découverte de la nébuleuse Pa30 comme étant le résidu de la supernova historique SN 1181, qui était recherché depuis de nombreuses années. Depuis, les observations de Pa30 se sont poursuivies afin de mieux comprendre les caractéristiques de cette supernova un peu différente des autres (probablement une supernova de type Iax, explosion partielle de naine blanche). Tim Cunningham, du Harvard Smithonian Center for Astrophysics à Boston et ses collaborateurs viennent de publier dans The Astrophysical Journal Letters leurs observations des propriétés d'expansion de la petite coquille de gaz... Source Expansion Properties of the Young Supernova Type Iax Remnant Pa 30 RevealedTim Cunningham et al.The Astrophysical Journal Letters, Volume 975, Number 1 (2024 October 24) https://doi.org/10.3847/2041-8213/ad713b Illustrations Image de Pa30 dans la raie du soufre ionisé et zone des filaments étudiée par les auteurs (Tim Cunningham et al.) Distribution des vitesses radiales des filaments en fonction du rayon apparent et de la distance radiale par rapport à l'étoile centrale. (Tim Cunningham et al.) Comparaison de l'image des filaments avec une image de Pa30 en rayons X révélant le lien avec la cavité observée (Tim Cunningham et al.) Tim Cunningham

SpaceTime Series 27 Episode 116*Discovery of More Black Holes Than Expected in the Early UniverseA new study using the Hubble Space Telescope has uncovered a significantly higher number of supermassive black holes in the early universe than previously anticipated. Published in the Astrophysical Journal Letters, the findings could revolutionise our understanding of how these ancient black holes formed shortly after the Big Bang. Astronomers, including Alice Young from Stockholm University, suggest that these massive black holes might have originated from the collapse of massive gas clouds or through rapid mergers of smaller stellar-mass black holes.*New Volcano Spotted on Jupiter's Moon IoAstronomers have discovered a new volcano on Io, one of Jupiter's moons, using the Junocam instrument aboard NASA's Juno mission. Io, the most geologically active object in the solar system, boasts over 400 active volcanoes. The newly discovered volcano, located just south of Io's equator, was identified in the first close-up images of Io in over 25 years. The images reveal multiple lava flows and volcanic deposits, with sulphur staining on the eastern side and dark lava streams on the western side.*Confirming the Mass of the W BosonScientists at CERN have confirmed the mass of the W boson, a fundamental particle in physics, to be 80,360.2 mega electron volts, with a margin of error of 9.9 mega electron volts. This confirmation resolves a previous unexpected measurement and aligns with the Standard Model of particle physics. The study utilised data from the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider, involving the analysis of millions of events to achieve this precise measurement.www.spacetimewithstuartgary.comwww.bitesz.comThis week's guests include: Alice Young from Stockholm University

SpaceTime Series 27 Episode 115*How Black Holes Eat StarsAstronomers have developed a groundbreaking computer simulation detailing how supermassive black holes at the centres of galaxies can rip apart and consume entire stars. The study, published in the Astrophysical Journal Letters, provides new insights into the mysterious optical and ultraviolet emissions observed during these catastrophic events. Lead author Daniel Price from Monash University explains that the simulation captures the full evolution of the debris from a star being tidally disrupted by a black hole.*New Revelations About Earth's MantleA new study reveals that the chemical composition of the Earth's mantle is uniform globally and only changes as it passes through different layers of crust closer to the planet's surface. Reported in the journal Nature Geoscience, the findings suggest that lavas from volcanic hotspots around the world likely originate from a worldwide uniform reservoir in the Earth's mantle.*Water More Widespread on the Moon Than Previously ThoughtNew maps from both the near and far sides of the Moon show that the lunar surface contains vast amounts of water, mostly locked in the lunar regolith. The findings, published in the Planetary Science Journal, suggest multiple sources of water and hydroxyl in sunlit rocks and soils, including water-rich rocks excavated by meteor impacts at all lunar latitudes.www.spacetimewithstuartgary.comwww.bitesz.comThis week's guests include: Professor Daniel Price from Monash University

La nébuleuse de la Tarentule, située dans le Grand Nuage de Magellan, est connue pour sa forte activité de formation d'étoiles. En son centre se trouve le jeune amas d'étoiles massives R136, qui fournit une grande partie de l'énergie qui fait briller la nébuleuse. La collaboration internationale H.E.S.S vient de découvrir que cet amas d'étoiles produit également une forte émission de rayons gamma très énergétiques. Ils publient leur découverte dans The Astrophysical Journal Letters. Source Very-high-energy γ-Ray Emission from Young Massive Star Clusters in the Large Magellanic Cloud F. Aharonian et al. (HESS collaboration) The Astrophysical Journal Letters, Volume 970, Number 1 (19 july 2024) https://doi.org/10.3847/2041-8213/ad5e67 Illustrations La nébuleuse de la Tarentule (ESO) Image gamma de 30 Dor C et R136 par HESS (HESS Collaboration) Localisation de la source gamma associée à R136 (HESS Collaboration) Le télescope Cherenkov HESS2 (Observatoire de Paris) Localisation de la source gamma associée à 30 Dor C (HESS Collaboration)

Join us for SpaceTime Series 27 Episode 77, where we explore the latest cosmic discoveries and advancements in space exploration.First, astronomers have discovered the earliest known pair of quasars in the process of merging. Reported in the Astrophysical Journal Letters, this discovery represents the earliest known merger of supermassive black holes, occurring just 900 million years after the Big Bang. This period, known as the cosmic dawn, is crucial for understanding the formation of the first stars and galaxies and the epoch of reionization.Next, NASA's Mars Perseverance rover has discovered oddly textured, popcorn-like rocks in a formation known as Bright Angel. These rocks suggest the presence of groundwater in Mars' past, and mission managers plan to conduct detailed exploration to uncover their origins.Finally, new insights into the Milky Way's supermassive black hole, Sagittarius A*, have been presented at the 244th meeting of the American Astronomical Society. Using decades of x-ray data, astronomers have uncovered previously undetected flares and echoes, providing valuable information about the black hole's environment and past activity.Follow our cosmic conversations on X @stuartgary, Instagram, YouTube, and Facebook. Join us as we unravel the mysteries of the universe, one episode at a time.Sponsor OfferThis episode is proudly supported by NordPass. Secure your digital journey across the cosmos with a password manager you can trust. Find your stellar security solution at https://www.bitesz.com/nordpass.Listen to SpaceTime on your favourite podcast app including Apple Podcasts, Spotify, YouTube Music, or wherever you get your podcasts.Support SpaceTimeBecome a supporter of SpaceTime: https://www.bitesz.com/show/spacetime/support/www.bitesz.com

Des astrophysiciens ont trouvé davantage de galaxies spirales semblables à la Voie Lactée dans l'univers jeune, à un redshift compris entre 0,5 et 4, de quoi se gratter la tête une nouvelle fois. L'étude est publiée dans The Astrophysical Journal Letters. Source JWST Reveals a Surprisingly High Fraction of Galaxies Being Spiral-like at 0.5 ≤ z ≤ 4Vicki Kuhn et al.The Astrophysical Journal Letters 2024 968 (11 june 2024)

Une équipe de chercheurs rapport pour la première fois, l'observation d'une galaxie annulaire collisionnelle formée à la suite de la traversée d'une grande galaxie par une galaxie « balle » plus petite, qui se trouve être la contrepartie d'une source de rayons gamma qui n'avait pas encore pu être associée (4FGL J1647.5-5724). Le système, également connu sous le nom de « roue de Kathryn», contient deux galaxies irrégulières naines et une galaxie spirale de type tardif entourée d'un anneau de nœuds de formation d'étoiles. L'étude est publiée dans The Astrophysical Journal Letters. Source A γ-Ray-emitting Collisional Ring Galaxy System in Our Galactic NeighborhoodVaidehi S. Paliya and D. J. SaikiaThe Astrophysical Journal Letters, Volume 967, Number 2 (22 may 2024)https://iopscience.iop.org/article/10.3847/2041-8213/ad4999

Une équipe d'astrophysiciens vient de découvrir le premier pulsar milliseconde clairement identifié, dans le centre galactique. Il se trouve à proximité immédiate d'un grand filament radio. La découverte est publiée dans The Astrophysical Journal Letters.

La rotation du trou noir Cygnus X-1 vient d'être réestimée par une équipe d'astrophysiciens polonais et indiens. Ils trouvent toujours une solution qui permet de passer d'une vitesse de rotation très élevée à une vitesse de rotation très faible... L'étude est parue dans The Astrophysical Journal Letters. Source What Is the Black Hole Spin in Cyg X-1?Andrzej Zdziarski et al.The Astrophysical Journal Letters, Volume 967, Number 1 (17 may 2024)http://doi.org/10.3847/2041-8213/ad43ed

Pour la première fois, des astrophysiciens ont observé des trous noirs d'une taille inattendue par rapport à leur galaxie hôte au cours d'une période appelée le midi cosmique, dans l'univers âgé de 2 à 5 milliards d'années. Ces trous noirs très massifs pourraient combler le fossé entre les trous noirs trop massifs de l'univers primordial et ceux présents dans l'univers local. L'étude est publiée dans The Astrophysical Journal Letters. Source Overmassive Black Holes at Cosmic Noon: Linking the Local and the High-redshift UniverseMar Mezcua et al.The Astrophysical Journal Letters, 966 (2024 May 10) https://doi.org/10.3847/2041-8213/ad3c2a

Les amas d'étoiles nucléaires sont constitués d'une concentration dense d'étoiles et d'objets compacts qu'elles laissent derrière eux qui sont omniprésents dans les régions centrales des galaxies entourant leur trou noir supermassif central. Des interactions étroites entre les étoiles et les trous noirs de masse stellaire y conduisent à des fréquents événements de destructions d'étoiles par effets de marée (TDE). Une équipe d'astrophysiciens vient de découvrir un effet intéressant : la matière ainsi déchirée de l'étoile qui se retrouve libérée de l'emprise du petit trou noir stellaire peut se retrouver accrétée par le trou noir supermassif proche, donnant lieu à une seconde éruption. Ils publient leur étude dans The Astrophysical Journal Letters.https://www.ca-se-passe-la-haut.fr/2024/04/doubles-eruptions-de-type-tde-possibles.html Soutenez Ca Se Passe Là-Haut sur Tipeee : https://fr.tipeee.com/ca-se-passe-la-haut

A new image from the Event Horizon Telescope collaboration, which includes researchers and telescopes of the University of Arizona, has uncovered strong and organized magnetic fields spiraling from the edge of the supermassive black hole Sagittarius A*, or Sgr A*. Seen in polarized light for the first time, this new view of the monster lurking at the center of our Milky Way galaxy has revealed a magnetic field structure strikingly similar to that of a much more massive black hole, known as M87*, at the center of the M87 galaxy, suggesting that strong magnetic fields may be common to all black holes. This similarity also hints toward a hidden jet in Sgr A*. The results were published on March 27 in the journal The Astrophysical Journal Letters. Learning more about black holes and their magnetic fields Scientists unveiled the first image of Sgr A* - which is approximately 27,000 light-years from Earth - in 2022, revealing that while the Milky Way's supermassive black hole is more than a thousand times smaller and less massive than M87's, it looks remarkably similar. This made scientists wonder whether the two shared common traits outside of their looks. To find out, the team decided to study Sgr A* in polarized light. Previous studies of light around M87* revealed that the magnetic fields around the black hole giant allowed it to launch powerful jets of material back into the surrounding environment. Building on this work, the new images have revealed that the same may be true for Sgr A*. Boris Georgiev, an EHT postdoctoral researcher at UArizona's Steward Observatory and co-author on the study, said: "The consistency of magnetic field structures around Sgr A* and M87* suggests that the processes by which black holes feed and eject jets into their surroundings may be universal, despite their vast differences in size and mass." "What we're seeing now is that there are strong, twisted and organized magnetic fields near the black hole at the center of the Milky Way galaxy," said Sara Issaoun, NASA Hubble Fellowship Program Einstein Fellow at the Center for Astrophysics | Harvard & Smithsonian and co-lead of the project. "Along with Sgr A* having a strikingly similar polarization structure to that seen in the much larger and more powerful M87* black hole, we've learned that strong and ordered magnetic fields are critical to how black holes interact with the gas and matter around them." Light is a moving oscillation of electric and magnetic fields that allows us to see objects. Sometimes, light oscillates in a preferred orientation, also known as polarized. Although polarized light surrounds us, to human eyes it is indistinguishable from "normal," or non-polarized, light. In the plasma around these black holes, particles whirling around magnetic field lines impart a polarization pattern perpendicular to the field. This allows astronomers to see in increasingly vivid detail what is happening in black hole regions and map their magnetic field lines. "By imaging polarized light from hot glowing gas near black holes, we are directly inferring the structure and strength of the magnetic fields that thread the flow of gas and matter that the black hole feeds on and ejects," said Angelo Ricarte, Harvard Black Hole Initiative Fellow and project co-lead. "Polarized light teaches us a lot more about the astrophysics, the properties of the gas and mechanisms that take place as a black hole feeds." But imaging black holes in polarized light isn't as easy as putting on a pair of polarized sunglasses, and this is particularly true of Sgr A*, which is changing so fast that it doesn't sit still for pictures. Imaging the supermassive black hole requires sophisticated tools above and beyond those previously used for capturing M87*, a much steadier target. Dan Marrone, EHT co-principal investigator and a co-author of the paper who is a professor of astronomy at Steward Observatory, and his team developed instruments that detected the polarized radio ...

Une équipe d'astrophysiciens chinois a réussi à mettre en évidence un lien entre la détection par Fermi-LAT d'une émission gamma signant le réveil du blazar NVSS J1718+4239 après une longue période de calme et la détection d'un neutrino énergétique par IceCube. Ils publient leur étude dans The Astrophysical Journal Letters.https://www.ca-se-passe-la-haut.fr/2024/04/detection-dun-neutrino-coincident-avec.html Source The Awakening of a Blazar at Redshift 2.7 Temporally Coincident with the Arrival of Cospatial Neutrino Event IceCube-201221AXiong Jiang et al.The Astrophysical Journal Letters, Volume 965, Number 1 (2024 April 4)https://doi.org/10.3847/2041-8213/ad36b9

CUPOM VÁLIDO PARA TODO O MÊS DE MARÇO, NÃO SE ESQUEÇA, SÃO 15% DE DESCONTO EM MARÇO, O MÊS DE CONSUMIDOR, USE SPACE15!!! https://www.insiderstore.com.br/SpaceToday15 DIA 14 DE ABRIL ÀS 16 HORAS VENHA ASSISTIR O SPACE TODAY AO VIVO NO TEATRO GAZETA NA AVENIDA PAULISTA EM SÃO PAULO COM A APRESENTAÇÃO - SERÁ QUE ESTAMOS SOZINHOS? INGRESSOS DISPONÍVEIS NO LINK ABAIXO: https://bileto.sympla.com.br/event/91890/d/244709/s/1668211 ESTÃO ABERTAS AS MATRÍCULAS PARA A PÓS-GRADUAÇÃO LATO SENSU DO SPACE TODAY, ATÉ DIA 9 DE ABRIL PREÇO ESPECIAL, MATRICULE-SE AGORA: https://academyspace.com.br/ Uma nova imagem da colaboração Event Horizon Telescope (EHT) revelou campos magnéticos fortes e organizados a espiralar desde a borda do buraco negro supermassivo Sagitário A* (Sgr A*). Com observações feitas pela primeira vez em luz polarizada, a nova imagem do monstro que se esconde no coração da Via Láctea revelou um campo magnético com uma estrutura muito semelhante à do buraco negro situado no centro da galáxia M87, sugerindo que campos magnéticos intensos podem ser comuns a todos os buracos negros. Esta semelhança aponta também para a existência de um jato oculto em Sgr A*. Os resultados foram publicados hoje na revista da especialidade The Astrophysical Journal Letters. Em 2022, os cientistas revelaram a primeira imagem de Sgr A* durante conferências de imprensa em todo o mundo, incluindo no Observatório Europeu do Sul (ESO). Embora o buraco negro supermassivo da Via Láctea, que se encontra a cerca de 27 000 anos-luz de distância da Terra, seja pelo menos mil vezes mais pequeno e menos massivo do que o de M87, o primeiro buraco negro a ser fotografado, as observações revelaram que os dois têm um aspeto bastante semelhante, o que levou os cientistas a perguntarem-se se estes buracos negros partilhariam características comuns para além da sua aparência. Para o descobrir, a equipa decidiu estudar o Sgr A* em luz polarizada. Estudos anteriores da luz em torno do buraco negro de M87 (M87*) revelaram que os campos magnéticos à sua volta permitiam que o buraco negro lançasse poderosos jatos de material para o seu meio circundante. Com base neste trabalho, as novas imagens revelaram agora que o mesmo pode ser verdade para Sgr A*. FONTE: https://www.eso.org/public/portugal/news/eso2406/?lang #BLACKHOLE #UNIVERSE #EHT

La collaboration Event Horizon Telescope (EHT) vient de dévoiler une nouvelle image de l'anneau de plasma entourant Sgr A*, cette fois-ci avec des données de polarisation, révélant la direction des puissants champs magnétiques qui s'enroulent en spirale autour du trou noir supermassif. Ils publient deux articles dans The Astrophysical Journal Letters.https://www.ca-se-passe-la-haut.fr/2024/03/nouvelle-image-de-polarisation-de-sgr.html Sources First Sagittarius A* Event Horizon Telescope Results. VII. Polarization of the RingThe Event Horizon Telescope CollaborationThe Astrophysical Journal Letters, Volume 964, Number 2 (27 mars 2024) First Sagittarius A* Event Horizon Telescope Results. VIII. Physical Interpretation of the Polarized RingThe Event Horizon Telescope CollaborationThe Astrophysical Journal Letters, Volume 964, Number 2 (27 mars 2024)

How animals dealt with the ‘Anthropause' during COVID lockdowns (1:04)During the COVID lockdowns human behaviour changed dramatically, and wildlife scientists were interested in how that in turn changed the behaviour of animals in urban, rural and wilderness ecosystems. In a massive study of camera trap images, a team from the University of British Columbia has built a somewhat surprising picture of how animals responded to a human lockdown. Cole Burton, Canada Research Chair in Terrestrial Mammal Conservation at the University of British Columbia, was part of the team and their research was published in Nature Ecology & EvolutionScientists helping maintain an essential ice road to a northern community (9:40)The only ground connection between the community of Délı̨nę in the NWT and the rest of the country is a winter ice road that crosses Great Bear Lake. But climate warming in the north is making the season for the road shorter, and the ice on the lake less stable. A team of scientists from Wilfrid Laurier University, led by Homa Kheyrollah Pour, are supplementing traditional knowledge about the ice with drones, sensors, satellites and radar to help the community maintain a safe connection with the world.Stars nudging the solar system's planets leads to literal chaos (17:40)The orbits of the planets in our solar system are in a complex dance, orchestrated by the gravitational pull from the sun but influenced by their interactions with each other. Now, due the findings of a new study in The Astrophysical Journal Letters, that dance is a lot harder to predict. Nathan Kaib, from the Planetary Science Institute, said the chaos that stars passing by our solar system introduces to simulations deep into the past or far into the future make our planetary promenade predictions a lot less certain. A freaky fish, the gar, really is a living fossil because evolution has barely changed it (26:33)`The seven species of gar fish alive today are nearly indistinguishable from their prehistoric fossilised relatives that lived millions of years ago. Now in a new study in the journal Evolution, scientists describe why these “living fossils” have barely changed and why two lineages separated by 105-million years can hybridise. Chase Brownstein, a graduate student at Yale University, discovered the gar's genome has changed less over time than any other species we know, a finding which could hold the key to fighting human diseases like cancer.Water, water, everywhere. But will we have enough to drink? (33:47)To mark world water day, Quirks & Quarks producer Amanda Buckiewicz is looking at the challenges we're facing with our global freshwater resources. It's one of Nature's bounties, and vital to agriculture and healthy ecosystems. But climate change and overexploitation are creating a global water crisis as glaciers melt, snowpack becomes less predictable, rainfall patterns change, and we overdraw the global groundwater bank. We spoke with:Miina Porkka, associate professor from the University of Eastern Finland. Related paper published in the journal Nature.Christina Aragon, PhD student at Oregon State University. Related paper published in the journal Hydrology and Earth System Sciences.Katrina Moser, associate professor and chair of the department of Geography and Environment at Western University.Scott Jasechko, associate professor at the Bren School of Environmental Science and Management at the University of California, Santa Barbara. Related paper published in the journal Nature.

En septembre dernier, je vous relatais un étude qui s'intéressait à l'exoplanète K2-18b qui posséderait des caractéristiques très intéressantes, à la fois aqueuses et hydrogénées avec la détection d'une trace de sulfure de diméthyle, une molécule produite par le vivant sur Terre. Des simulations de la chimie complexe dans l'environnement de K2-18b viennent d'être effectuées et les conclusions sont moins optimistes... L'étude est parue dans The Astrophysical Review Letters.https://www.ca-se-passe-la-haut.fr/2024/02/k2-18b-le-methane-peut-etre-explique.html Source JWST Observations of K2-18b Can Be Explained by a Gas-rich Mini-Neptune with No Habitable SurfaceNicholas F. Wogan et al.The Astrophysical Journal Letters, Volume 963, Number 1 (20 february 2024)https://doi.org/10.3847/2041-8213/ad2616

La détection récente des isotopes 60Fe et 244Pu dans les sédiments océaniques profonds, remontant à 3 ou 4 Mégannées pose un sérieux défi pour l'identification de leur(s) site(s) de production. Alors que le 60Fe est généralement attribué aux supernovas à effondrement du cœur classiques, le plutonium est formé par processus r, une nucléosynthèse qui apparaît dans des classes très ares de supernovas ou des fusions d'étoiles à neutrons. Des chercheurs ont étudié l'énigme de ces isotopes en simulant l'effet qu'aurait eu une kilonova à proximité de la Terre il y a quelques millions d'années, ils publient leur étude dans The Astrophysical Journal Letters.https://www.ca-se-passe-la-haut.fr/2024/02/une-kilonova-dans-le-voisinage-du.html Source Did a Kilonova Set Off in Our Galactic Backyard 3.5 Myr ago?Leonardo Chiesa et al.The Astrophysical Journal Letters, Volume 962, Number 2 (13 february 2024)http://doi.org/10.3847/2041-8213/ad236e

Pendant des décennies, les résidus de supernova (SNR) ont été considérés comme les principales sources de rayons cosmiques galactiques. Mais la question de savoir si les SNR peuvent accélérer des protons jusqu'aux énergies de l'ordre du PeV (ce qui en ferait donc des PeVatrons) fait actuellement l'objet d'un débat intense. Une équipe d'astrophysiciens à étudié un site de production potentiel, à savoir le jeune résidu de supernova Cassiopeia A, grâce aux photons gamma ultra-énergétiques qui en proviennent et qui doivent être liés à la production de rayons cosmiques. Ils publient leurs résultat dans The Astrophysical Journal Letters.https://www.ca-se-passe-la-haut.fr/2024/01/cassiopeia-pevatron-ou-pas-pevatron.html Source Does or Did the Supernova Remnant Cassiopeia A Operate as a PeVatron?Zhen Cao et al.The Astrophysical Journal Letters, Volume 961, Number 2 (30 january 2024)https://doi.org/10.3847/2041-8213/ad1d62

La sonde New Horizons est toujours active et continue sa route dans les zones externes du système solaire, la ceinture de Kuiper peuplée de nombreux petits corps. Mais cette zone du système solaire comporte aussi de la poussière et New Horizons possède un détecteur de poussière qui est géré en partie par des étudiants états-uniens. Ils publient aujourd'hui dans The Astrophysical Journal Letters leurs derniers résultats jusqu'à une distance de 55 UA du Soleil, et ils trouvent un flux de poussière plus élevé que prévu par les modèles...https://www.ca-se-passe-la-haut.fr/2024/01/new-horizons-mesure-un-exces-de.html Source New Horizons Venetia Burney Student Dust Counter Observes Higher than Expected Fluxes Approaching 60 auAlex Doner et al.The Astrophysical Journal Letters, Volume 961, Number 2 (25 january 2024)https://doi.org/10.3847/2041-8213/ad18b0

BYD - ¿Cuántos planetas podría haber en el cinturón de Kuiper? Un estudio reciente publicado en The Astrophysical Journal Letters investiga la posible existencia de planetas flotantes libres (FFP) del tamaño de Marte, también conocidos como planetas rebeldes, planetas sin estrellas y planetas errantes, que podrían haber sido capturados por la gravedad de nuestro Sol hace mucho tiempo y orbita en el sistema solar exterior aproximadamente a 1.400 unidades astronómicas (AU) del Sol. Escucha el episodio completo en la app de iVoox, o descubre todo el catálogo de iVoox Originals

Exoplanet discoveries have been piling up faster and faster over the last decade, limiting announcements of new discoveries to the strange, unusual, and unexpected. One unexpected type of planet is the possible Hycean world -- hot, water-covered worlds with hydrogen atmospheres larger than Earth but smaller than Neptune with sizable habitable zones.    With the addition of JWST's capabilities, previously discovered exoplanets are now being analyzed for their atmospheric composition, and the results are intriguing. In a new paper accepted for The Astrophysical Journal Letters, the atmosphere of an exoplanet known as K2-18 b was found to contain carbon dioxide and methane, adding the world to the list of possible Hycean planets. Additionally, a molecule called dimethyl sulfide, which on Earth is only produced by life, was possibly detected.   Join communications specialist Beth Johnson as she speaks with lead author Dr. Nikku Madhusudhan, an astronomer at the University of Cambridge, in a SETI Live at a special time. (Recorded live on 21 September 2023.) Preprint of the paper: https://arxiv.org/pdf/2309.05566.pdf   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.

Recorded live 29 June 2023. Gravitational waves play a cosmic symphony as they pass through our galaxy. This week, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) Physics Frontiers Center released the results of 15 years of data in a set of papers published in The Astrophysical Journal Letters. This research is the first evidence of gravitational waves at very low frequencies.   The team, comprised of 190 scientists, transformed our region of the Milky Way Galaxy into an immense gravitational-wave antenna using pulsars. NANOGrav's endeavor involved collecting data from 68 pulsars, fashioning a pulsar timing array—a distinctive type of detector.   In 2020, with over a decade of data, NANOGrav scientists detected hints of an additional enigmatic "hum" in the timing behavior of all the pulsars in their array. After exploring alternative explanations, they grew confident in the authenticity of this signal. Its detection became increasingly feasible with more extensive observations.    However, at that stage, the gravitational-wave signature predicted by general relativity remained too faint to emerge. After fifteen years of pulsar observations, the evidence of gravitational waves, with periods spanning years to decades, emerges prominently.   Join Simon Steel, Deputy Director of the Carl Sagan Center, as he discusses this groundbreaking research with NANOGrav team member and SETI Institute researcher Dr. Michael Lam. Press release: https://www.seti.org/press-release/nanogravs-15-year-journey-reveals-cosmic-hum   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.

Alors que je m'apprêtais à vous relater un article paru le 27 novembre au sujet de la source radio persistante qui est observée à proximité immédiate du célèbre FRB répétitif FRB 20121102A, aujourd'hui sort un autre article qui fournit la caractérisation de la seule autre source radio persistante coïncidant avec la position d'un FRB répétitif : FRB 20190520B. On va donc parler des deux études qui sont assez similaires, sur des FRB très ressemblants, et menant à une conclusion convergente...https://www.ca-se-passe-la-haut.fr/2023/12/deux-sources-radio-persistantes.html Sources A Comprehensive Observational Study of the FRB 121102 Persistent Radio SourceGe Chen et.The Astrophysical Journal, Volume 958 (27 november 2023)https://doi.org/10.3847/1538-4357/ad02f3 Constraints on the Persistent Radio Source Associated with FRB 20190520B Using the European VLBI NetworkShivani Bhandari et al.The Astrophysical Journal Letters, Volume 958 (30 november 2023)https://doi.org/10.3847/2041-8213/ad083f

Une équipe d'astrophysiciens vient d'analyser les premiers résultats du programme CECILIA (Chemical Evolution Constrained using Ionized Lines in Interstellar Aurorae) , qui utilise le télescope spatial Webb pour étudier la chimie des galaxies lointaines. Dans leur article publié dans The Astrophysical Journal Letters, on découvre que les galaxies dites « adolescentes », qui se sont formées deux à trois milliards d'années après le Big Bang, sont inhabituellement chaudes et contiennent des éléments inattendus, comme le nickel...https://www.ca-se-passe-la-haut.fr/2023/11/detection-de-nickel-dans-des-galaxies.html Source CECILIA : Faint émission line spectre of z~2-3 star-forming galaxiesAllison L. Strom et al.The Astrophysical Journal Letters , Volume 958 (20 november)https://doi.org/10.3847/2041-8213/ad07dc

AC Her est un couple d'étoiles de type AGB (des étoiles géantes) qui se révèle unique en son genre, comme l'ont découvert une équipe d'astrophysiciens aux Etats-Unis. Le couple d'étoiles possède un disque de poussière et au moins une planète, mais ce disque et cette planète ont une orbite qui est quasi- perpendiculaire au plan orbital du système des deux étoiles. La découverte de cette première planète circumbinaire en orbite polaire est publiée dans The Astrophysical Journal Letters.https://www.ca-se-passe-la-haut.fr/2023/11/decouverte-indirecte-dune-planete-en.html Source AC Her: Evidence of the First Polar Circumbinary PlanetRebecca G. Martin et al.The Astrophysical Journal Letters, Volume 957, Number 2 (8 november 2023)https://doi.org/10.3847/2041-8213/ad0730 Soutenez Ca Se Passe Là-Haut sur Tipeee : https://fr.tipeee.com/ca-se-passe-la-haut Participez à l'épisode anniversaire des 10 ans de CSPLH en enregistrant un message audio : https://www.ca-se-passe-la-haut.fr/p/parlez-nous-de-ca-se-passe-la-haut.html

Exoplanet discoveries have been piling up faster and faster over the last decade, limiting announcements of new discoveries to the strange, unusual, and unexpected. One unexpected type of planet is the possible Hycean world -- hot, water-covered worlds with hydrogen atmospheres larger than Earth but smaller than Neptune with sizable habitable zones. With the addition of JWST's capabilities, previously discovered exoplanets are now being analyzed for their atmospheric composition, and the results are intriguing. In a new paper accepted for The Astrophysical Journal Letters, the atmosphere of an exoplanet known as K2-18 b was found to contain carbon dioxide and methane, adding the world to the list of possible Hycean planets. Additionally, a molecule called dimethyl sulfide, which on Earth is only produced by life, was possibly detected. Join communications specialist Beth Johnson as she speaks with lead author Nikku Madhusudhan, an astronomer at the University of Cambridge, in a SETI Live at a special time. (Recorded live on 21 September 2023.) Preprint of the paper: https://arxiv.org/pdf/2309.05566.pdf

Gravitational waves play a cosmic symphony as they pass through our galaxy. This week, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) Physics Frontiers Center released the results of 15 years of data in a set of papers published in The Astrophysical Journal Letters. This research is the first evidence of gravitational waves at very low frequencies. The team, comprised of 190 scientists, transformed our region of the Milky Way Galaxy into an immense gravitational-wave antenna using pulsars. NANOGrav's endeavor involved collecting data from 68 pulsars, fashioning a pulsar timing array—a distinctive type of detector. In 2020, with over a decade of data, NANOGrav scientists detected hints of an additional enigmatic "hum" in the timing behavior of all the pulsars in their array. After exploring alternative explanations, they grew confident in the authenticity of this signal. Its detection became increasingly feasible with more extensive observations. However, at that stage, the gravitational-wave signature predicted by general relativity remained too faint to emerge. After fifteen years of pulsar observations, the evidence of gravitational waves, with periods spanning years to decades, emerges prominently. Join Simon Steel, Deputy Director of the Carl Sagan Center, as he discusses this groundbreaking research with NANOGrav team member and SETI Institute researcher Dr. Michael Lam. Press release: https://www.seti.org/press-release/nanogravs-15-year-journey-reveals-cosmic-hum Recorded live 29 June 2023

Desde que el Telescopio Espacial Hubble se puso en órbita en 1990, no ha dejado de sorprendernos con impactantes imágenes del Universo. No obstante, como sucede con cada instrumento de observación astronómica creado desde que Galileo apuntó por primera vez su telescopio al firmamento, las observaciones del Hubble también dejan entrever objetos astronómicos demasiado lejanos y difusos que invitan a pensar en la existencia de otros muchos que escapan a sus posibilidades de observación. Algunos de esos objetos dejan una débil señal que los científicos interpretan como galaxias y que reciben el nombre de “Galaxias oscuras para el Hubble”. El 25 de diciembre de 2021 se lanzó al espacio el Telescopio Espacial James Webb (JWST), el más poderoso observatorio astronómico espacial hasta la fecha. Como sucedió tantas veces anteriormente, las imágenes obtenidas con el nuevo instrumento están impactando a la comunidad científica, y no científica. Ahora, Pablo G. Pérez González (CAB) y un extenso grupo de científicos acaban de publicar en revista científica The Astrophysical Journal Letters un artículo que muestra cómo es el universo de galaxias visto por el JWST.

Desde que el Telescopio Espacial Hubble se puso en órbita en 1990, no ha dejado de sorprendernos con impactantes imágenes del Universo. No obstante, como sucede con cada instrumento de observación astronómica creado desde que Galileo apuntó por primera vez su telescopio al firmamento, las observaciones del Hubble también dejan entrever objetos astronómicos demasiado lejanos y difusos que invitan a pensar en la existencia de otros muchos que escapan a sus posibilidades de observación. Algunos de esos objetos dejan una débil señal que los científicos interpretan como galaxias y que reciben el nombre de “Galaxias oscuras para el Hubble”. El 25 de diciembre de 2021 se lanzó al espacio el Telescopio Espacial James Webb (JWST), el más poderoso observatorio astronómico espacial hasta la fecha. Como sucedió tantas veces anteriormente, las imágenes obtenidas con el nuevo instrumento están impactando a la comunidad científica, y no científica. Ahora, Pablo G. Pérez González (CAB) y un extenso grupo de científicos acaban de publicar en revista científica The Astrophysical Journal Letters un artículo que muestra cómo es el universo de galaxias visto por el JWST.

https://youtu.be/XbJ1TsRewDk Host: Fraser Cain ( @fcain )Special Guest: Pulsars have baffled scientists for decades, including how they work and what form matter takes within a pulsar. Using data collected by the Neutron Star Interior Composition Explorer (NICER) Mission between July 2017 and December 2018, scientists have not only been able to make the most precise size measurements of Pulsar J0030+0451 (located 1,100 light-years away in the constellation Pisces), but they have also mapped hotspots located on its surface. This week we are joined by Dr. Zaven Arzoumanian and Dr. Keith Gendreau, members of the Goddard Team that mapped J0030 and co-authors of "Focus on NICER Constraints on the Dense Matter Equation of State" published in the Astrophysical Journal Letters in December, 2019. (https://iopscience.iop.org/journal/20....    Zaven is the Deputy Principal Investigator and Science Lead for NICER.    Keith is Principal Investigator NICER. Be sure to follow him on Twitter: https://twitter.com/keithgendreau Regular Guests: Dr. Leah Jenks ( https://leahjenks.com/ / @leahgjenks ) Pam Hoffman ( http://spacer.pamhoffman.com/ & http://everydayspacer.com/ & @EverydaySpacer ) Dave Dickinson ( http://astroguyz.com/ & @Astroguyz ) This week's stories: - The LUCY Mission passes Earth! - China's first orbiting solar observatory! - Everything coming up in space! - The first map of the night sky! - A potential dark matter signal. - JWST's Pillars!   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.