GAMMA RAYS

Welcome to my channel! I'm Dr Maggie Lieu and I make youtube videos about space & astronomy. In this weeks video, I'll be talking about the most energetic events in our Universe. Extra reading: GRB080916C, Fermi Collaboration: http://www.sciencemag.org/cgi/rapidpdf/1169101.pdf Ophiuchus cluster AGN outburst, Giacintucci+2020: https://arxiv.org/abs/2002.01291 Media credits: Solo: ESA/SOLO/ATG solarflare: ESA supernova: hubble Milkyway: NASA/ESA/Holwerda If you enjoyed the video, please help me by liking, sharing and subscribing! I'm also on: twitter: https://twitter.com/space_mog instagram: https://instagram.com/space_mog/ facebook: https://facebook.com/spacemog/

This cataclysmic event just generated the “brightest” light in the known universe—and we detected it using MAGIC. » Subscribe to Seeker! http://bit.ly/subscribeseeker » Watch more Elements! http://bit.ly/ElementsPlaylist » Visit our shop at http://shop.seeker.com Scientists recently recorded the most intense electromagnetic event in the universe. The events on record are called gamma-ray bursts, or GRBs, and they are considered the most energetic explosions in our universe. In general, gamma rays result from all kinds of cosmic events, like celestial bodies crashing into one another, or matter getting sucked into black holes, or stars exploding. Gamma-ray bursts, in particular, can result from two things: long GRBs are from star deaths, and short GRBs are from collisions between things like neutron stars. A GRB that is the result of an exploding star is what scientists think they have recently measured with the Major Atmospheric Gamma Imaging Cherenkov Telescopes, or MAGIC. In a very cool space tool collaboration, two NASA satellites observed the GRB and told the telescope to turn its eyes in that direction, and then more detailed observations of the radiation itself were recorded by other observatories, including the Hubble Space Telescope. Events like this release a huge stream of energy when the star dies, before it decays into a neutron star or a black hole. And this most recent star explosion in particular went out with quite a bang: Photons from this event carried 1 trillion electron volts of energy. That’s the record for most energy of any GRB ever recorded. Observations from this most recent GRB (and a slightly less energetic one recorded in 2018) have opened up a whole new cosmological door for us. Find out more about what scientists have learned and how this work could impact our lives here on Earth in this Elements. #GammaRayBursts #Stars #Space #Telescope #Hubble #NASA #Seeker #Elements #Science Scientists Just Witnessed the Birth of a Heavy Element in Space https://www.youtube.com/watch?v=c5WKpFZHYPk ____________________ Read More: Breaking the limits: Discovery of the highest-energy photons from a gamma-ray burst https://www.eurekalert.org/pub_releases/2019-11/mpif-btl111519.php This ground-breaking achievement by MAGIC provides critical new insight for understanding the physical processes at work in GRBs, which are still mysterious. The photons detected by MAGIC must originate from a process hitherto unseen in the afterglows of GRBs, clearly distinct from the physical process that is known to be responsible for their emission at lower energies. An 'unknown' burst of gravitational waves just lit up Earth's detectors https://www.cnet.com/news/an-unknown-burst-of-gravitational-waves-just-lit-up-earths-detectors/ The gravitational waves we've detected so far usually relate to extreme cosmic events, like two black holes colliding or neutron stars finally merging after being caught in a death spiral. Burst gravitational waves have not been detected before and scientists hypothesize they may be linked to phenomena such as supernova or gamma ray bursts, producing a tiny "pop" when detected by the observatories. Stars need a partner to spin universe's brightest explosions https://www.sciencedaily.com/releases/2020/01/200113104201.htm A long gamma-ray burst (GRB), the type examined in this study, occurs when a massive star about ten times the size of our sun goes supernova, collapses into a neutron star or black hole and fires a relativistic jet of material into space. Instead of the star collapsing radially inwards, it flattens down into a disc to conserve angular momentum. As the material falls inwards, that angular momentum launches it in the form of a jet along the polar axis. ____________________ Elements is more than just a science show. It’s your science-loving best friend, tasked with keeping you updated and interested on all the compelling, innovative and groundbreaking science happening all around us. Join our passionate hosts as they help break down and present fascinating science, from quarks to quantum theory and beyond. Seeker empowers the curious to understand the science shaping our world. We tell award-winning stories about the natural forces and groundbreaking innovations that impact our lives, our planet, and our universe. Visit the Seeker website https://www.seeker.com/videos Elements on Facebook https://www.facebook.com/SeekerElements/ Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel Seeker on Twitter http://twitter.com/seeker Seeker on Facebook https://www.facebook.com/SeekerMedia/ Seeker http://www.seeker.com/

New observations from the NASA/ESA Hubble Space Telescope have investigated the nature of the powerful gamma-ray burst GRB 190114C by studying its environment. Hubble’s observations suggest that this particular burst displayed such powerful emission because the collapsing star was sitting in a very dense environment, right in the middle of a bright galaxy 5 billion light years away. More information and download options: http://www.spacetelescope.org/videos/heic1921b/ Subscribe to Hubblecast in iTunes! https://itunes.apple.com/gb/podcast/hubblecast-hd/id258935617 Receive future episodes on YouTube by pressing the Subscribe button above or follow us on Vimeo: https://vimeo.com/hubbleesa Watch more Hubblecavideo.web_category.allst episodes: http://www.spacetelescope.org/videos/archive/category/hubblecast/ Credit: ESO Directed by: Bethany Downer and Nico Bartmann. Editing: Nico Bartmann. Web and technical support: Gurvan Bazin and Raquel Yumi Shida. Written by: Bethany Downer Music: John Stanford - Far Centaurus (johnstanfordmusic.com). Footage and photos: ESA, Hubble, NASA, M. Kornmesser, A. de Ugarte Postigo, A. J. Levan, NAOJ.

Size epitomises the universe... but as numbers climb, the question is what is the largest thing we have ever found? Well, the current largest-known cosmic structure, by definition, is the so-called Hercules-Corona Borealis Great Wall. This suspected galaxy filament was discovered through its apparent high frequency of Gamma Ray Bursts, and currently is the only structure in the universe known to exceed 10 billion light years. But the nature of the wall is still shrouded in mystery. Everything from its name, to its size, to its formation is debated by scientists... but with similar discoveries of massive GRB formations, our knowledge of distribution, matter and creation within the bounds of this universe is being pushed to the limit. FOLLOW MY NEW TWITTER! https://twitter.com/SEA_yt_ Join the NEW, OFFICIAL PARTNER #SeaSquad 100K Discord Server! https://discord.gg/SEA Sources, Footage and Attribution: ========================== SOURCES OF INFORMATION: - Original paper highlighting the discovery: https://arxiv.org/abs/1311.1104 - List of the largest cosmic structures: https://en.wikipedia.org/wiki/List_of_largest_cosmic_structures - LiveScience article on the topic: https://www.livescience.com/62530-biggest-object-in-universe.html - Galactic walls and the uniform distribution of matter: https://www.youtube.com/watch?v=OpxPIqobD78 MUSIC (In order of appearance): - Cylinder Six - Chris Zabriskie - I Used to Need the Violence - Chris Zabriskie - They Call It Nature - Chris Zabriskie All tracks by Chris Zabriskie licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://chriszabriskie.com/reappear/ Artist: http://chriszabriskie.com/ FOOTAGE: Multiple sequences in this video were captured using SpaceEngine Pro, a virtual universe simulator! http://spaceengine.org/ Get SpaceEngine on Steam and try it for yourself: https://store.steampowered.com/app/314650/SpaceEngine/ Much of the stock footage in this video was provided by Videezy.com. Check them out: https://www.videezy.com/ - Gamma Ray Burst Demonstration: https://www.youtube.com/watch?v=7uN1AjMui5k - Supernova Demonstration: https://www.youtube.com/watch?v=xIdJtIDReM8 - A Space Journey (8m Exhibition): https://www.youtube.com/watch?v=Un5SEJ8MyPc - Green Nebula Fly-By: https://www.youtube.com/watch?v=JbC6KVzn-m0 - Blue Nebula Fly-Through: https://www.youtube.com/watch?v=EaM9kDPa_AY - Satellite Dish: https://www.videezy.com/members/beachfront - Provided by Beachfront under a Creative Commons license - Brain: https://www.youtube.com/watch?v=KKkD-owpCSk - Nebula Space Scene: https://www.youtube.com/watch?v=eoEVCau7hio - Provided by RoyaltyFreeTube under a Creative Commons License - Void / Dust Footage: https://www.youtube.com/watch?v=Nw6Y5RldX9I ====================================================== Business Enquiries: [email protected]

Hello, and welcome to the new series on Astroathens. In this series I will cover all the wonders of the universe that correspond to the coffee of the day. As you see in this first episode, I used espresso to compare to a gamma ray burst, where espresso is known for being a quick shot of caffeine, producing a large amount of energy after you drink it. Likewise, a gamma-ray burst which produces a large amount of energy in a rapidly brief moment. Tune in next Thursday for a new episode of Café Astroathens. Must by dayebeats: https://www.youtube.com/user/ZonaFTW

The world’s premier astronomy and space science podcast. *Micro-quasar blasting gamma rays towards Earth Astronomers have detected high energy gamma rays violently blasting out of a micro-quasar within the Milky Way galaxy. *Alien asteroid Oumuamua posing new mysteries A new study has placed new size limits on how big that strange looking interstellar asteroid Oumuamua is likely to be. *Mission End for planet-hunting Kepler Space Telescope Just days after the sudden end of NASA’s Dawn mission to the Main Asteroid Belt – mission managers bed a fond farewell to another tireless space workhorse – the planet-hunting Kepler Space Telescope. *The Science Report A new study has found that coffee drinkers love the bitter taste of caffeine while tea lovers hate it. Apple launches a new online tool that lets users delete all the data Apple’s collected on them. Red-brown and blue-green pigments in birds' eggs first evolved while they were still dinosaurs. Glyphosate discovered in common brands of dog and cat foods Skeptics guide warns of claims a woman cured her cervical dysplasia with prayer and holistic medicine. For enhanced Show Notes including photos to accompany this episode, visit: http://www.bitesz.com/spacetimeshownotes Subscribe, rate and review SpaceTime at all good podcasting apps…including Apple Podcasts (formerly iTunes), Google Podcasts, Stitcher, PocketCasts, Podbean, Radio Public, TuneIn Radio, google play, Spreaker, Spotify, Deezer, ACast etc RSS feed: https://feeds.megaphone.fm/spacetime Would you prefer to have access to the special commercial-free version of SpaceTime? Help support the show, subscribe at Patreon....and share in the rewards. Details at www.patreon.com/spacetimewithstuartgary Help support SpaceTime: The SpaceTime with Stuart Gary merchandise shop. Get your T-Shirts, Coffee Cups, badges, tote bag + more and help support the show. Check out the range: http://www.cafepress.com/spacetime Thank you. Plus: As a part of the SpaceTime family, you can get a free audiobook of your choice, plus 30 days free access from audible.com. Just visit www.audibletrial.com/spacetime or click on the banner link at www.spacetimewithstuartgary.com Email: [email protected] To receive the Astronomy Daily Newsletter free, direct to your inbox...just join our mailing list at www.bitesz.com/mailinglist Stream podcast episodes on demand from www.spacetimewithstuartgary.com (mobile friendly).

Gamma-ray bursts are one of the biggest mysteries in modern astronomy, but the mystery began on accident, thanks to the Cold War! For special, curated artifacts of this universe, check out https://scishowfinds.com/ ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: azarus G, Sam Lutfi, D.A. Noe, الخليفي سلطان, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://heasarc.gsfc.nasa.gov/docs/sax/sax.html https://apod.nasa.gov/htmltest/jbonnell/www/grbhist.html https://www.jstor.org/stable/24950462 http://adsabs.harvard.edu/abs/1973ApJ...182L..85K http://adsabs.harvard.edu/abs/1973ApJ...185L..57W https://arxiv.org/abs/astro-ph/9810274 https://arxiv.org/abs/astro-ph/0609142v1 https://arxiv.org/abs/1710.00142 https://arxiv.org/pdf/1710.05620.pdf https://arxiv.org/pdf/1712.08123.pdf http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=grb+970228&submit=SIMBAD+search https://www.nature.com/articles/387479a0 https://arxiv.org/abs/1107.1661 Images: https://commons.wikimedia.org/wiki/File:GRB080319B_illustration_NASA.jpg https://commons.wikimedia.org/wiki/File:Vela5b.jpg https://apod.nasa.gov/htmltest/jbonnell/www/grbhist.html https://commons.wikimedia.org/wiki/File:Chandra_Gamma_Ray_Burst_01.jpg https://commons.wikimedia.org/wiki/File:BeppoSAX.jpg https://commons.wikimedia.org/wiki/File:Hubble_captures_infrared_glow_of_a_kilonova_blast.jpg https://svs.gsfc.nasa.gov/12740 https://commons.wikimedia.org/wiki/File:GammaRayBurst-20170727.jpg

For the first time ever, scientists using Fermi Gamma-ray Space Telescope have found the source of a high-energy neutrino from outside our galaxy. This neutrino travelled 3.7 billion years at nearly light speed before being detected on Earth -- farther than any other neutrino we know the origin of. High-energy neutrinos are hard-to-catch particles that scientists think are created by the most powerful events in the cosmos, like galaxy mergers and material falling onto supermassive black holes. They travel a whisker shy of the speed of light and rarely interact with other matter, so they can travel unimpeded across billions of light-years. The IceCube Neutrino Observatory at the South Pole detected signs of a neutrino striking the Antarctic ice with an energy of about 300 trillion electron volts -- more than 45 times the energy achievable in the most powerful particle accelerator on Earth. This high energy strongly suggested that the neutrino had to be from beyond our solar system. Backtracking the path through IceCube indicated where in the sky the neutrino came from, and automated alerts notified astronomers around the globe to search this region for flares or outbursts that could be associated with the event. Data from Fermi’s Large Area Telescope revealed enhanced gamma-ray emission from a well-known active galaxy at the time the neutrino arrived. This active galaxy is a type called a blazar, where a supermassive black hole with millions to billions of times the Sun’s mass that blasts particle jets outward in opposite directions at nearly the speed of light. Blazars are especially bright and active because one of these jets happens to point almost directly toward Earth. Fermi showed that at the time of the neutrino detection, the blazar TXS 0506+056 was the most active it had been in a decade. The discovery is a giant leap forward in a growing field called multimessenger astronomy, where new cosmic signals like neutrinos and gravitational waves are definitively linked to sources that emit light. Light Years Away

The Gamma-ray Burst Monitor (GBM) is one of the instruments aboard the Fermi Gamma-ray Space Telescope. The GBM studies gamma-ray bursts, the most powerful explosions in the universe, as well as other flashes of gamma rays. Gamma-ray bursts are created when massive stars collapse into black holes or when two superdense stars merge, also producing a black hole. The GBM sees these bursts across the entire sky, and scientists are using its observations to learn more about the universe. Music: The Success by Keys of Moon | https://soundcloud.com/keysofmoon Music promoted by https://www.free-stock-music.com Credit:NASA's Goddard Space Flight Center Shoshana Schlauderaff: Lead Producer Scott Wiessinger (USRA): Support Aaron E. Lepsch (ADNET Systems Inc.): Technical Support Jeanette Kazmierczak (University of Maryland College Park): Science Writer Judith Racusin (NASA/GSFC): Narrator This video is public domain and along with other supporting visualizations can be downloaded from the Scientific Visualization Studio at: https://svs.gsfc.nasa.gov/13041 If you liked this video, subscribe to the NASA Goddard YouTube channel: https://www.youtube.com/NASAExplorer Follow NASA’s Goddard Space Flight Center · Facebook: https://www.facebook.com/NASA.GSFC · Twitter https://twitter.com/NASAGoddard · Flickr https://www.flickr.com/photos/gsfc/ · Instagram https://www.instagram.com/nasagoddard/

Animation of a star exploding into a supernova and fueling a gamma-ray burst. Astronomers caught the enduring "afterglow" of one of these cataclysmic explosions with both ALMA and the VLA for the first time. The rebound, or reverse shock, triggered by the GRB’s powerful jets slamming into surrounding debris, lasted thousands of times longer than expected, giving astronomers an unprecedented glimpse into the structure and dynamics of the jets. Credit: NRAO/AUI/NSF; S. Dagnello

A single gamma ray carries millions of times the energy of a single photon of visible light. This means that gamma rays are produced only in the most convulsive environments in the universe – pulsars spinning inside huge magnetic fields, stars in binary systems devouring their partners, and black holes at the centers of galaxies swallowing gas clouds more massive than our sun. The Fermi Gamma-ray Space Telescope was launched on June 11, 2008, to measure these extreme astronomical events. In this lecture, SLAC scientist Eric Charles describes how we observe astronomical gamma rays and why we must go to space to see them. Then he discusses how 10 years of observations from the Fermi Telescope have changed our understanding of the most violent objects in the universe. About the Speaker: Eric Charles grew up in New Mexico. He received his PhD in high-energy particle physics from the University of Wisconsin in 2002. After three years as a postdoctoral fellow at Lawrence Berkeley National Lab, he moved to SLAC in 2005 to help with the construction and testing of the Fermi Gamma-ray Space Telescope, and stayed on as a member of the Fermi instrument team. He’s been working to improve the performance of the telescope and actively studying the data it gathers on the gamma-ray sky. His hobbies include metal-working and pyrotechnics.

Fermi bubbles are made up of gamma rays, but where they came from is still up for debate. Did they come from a star-forming region, or the black hole at the middle of our galaxy? For special, curated artifacts of this universe, check out https://scishowfinds.com/ Hosted by: Caitlin Hofmeister ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Jerry Perez, Lazarus G, Kelly Landrum Jones, Sam Lutfi, Kevin Knupp, Nicholas Smith, D.A. Noe, alexander wadsworth, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://arstechnica.com/science/2013/01/star-formation-drives-huge-bubbles-in-the-milky-way/ https://www.nasa.gov/mission_pages/GLAST/news/new-structure.html https://news.nationalgeographic.com/news/2010/03/100303-gamma-ray-fog-fermi-dragons/ https://arstechnica.com/science/2017/09/highest-energy-cosmic-rays-bounce-off-bubble-irradiate-earth/ http://www.skyandtelescope.com/astronomy-resources/understanding-fermi-bubbles/ http://astronomy.com/news/2017/03/fermi-bubbles http://hubblesite.org/news_release/news/2017-10 Images: https://svs.gsfc.nasa.gov/12313 https://www.nasa.gov/mission_pages/GLAST/news/new-structure.html https://svs.gsfc.nasa.gov/20142 https://svs.gsfc.nasa.gov/30682 https://svs.gsfc.nasa.gov/30796

Stream on demand from www.bitesz.com (mobile friendly). *New model links high energy cosmic rays, neutrinos, and gamma rays One of the biggest mysteries in astroparticle physics may have been solved by a new model linking ultrahigh-energy cosmic rays, very high-energy neutrinos, and high-energy gamma rays to supermassive black holes. *Black Hole discovered hiding in globular cluster Astronomers have for the first time discovered an inactive black hole hiding silently in the heart of a globular cluster. *New study could help predict volcanic eruptions Scientists have found a link between volcanic activity and tidal cycles. *February Skywatch We check out Orion, the Pleiades, Sirius and the Magellanic Clouds on February’s Skywatch. *The Science Report The oldest human fossil discovered outside Africa found in an Israeli cave. Using tiny crystals to predict volcanic eruptions. Discovery of a link between vitamin D blood levels and respiratory health. Scientists discover that most female cats are right handed. For enhanced Show Notes including photos to accompany this episode, visit: http://www.bitesz.com/spacetimeshownotes Subscribe, rate and review SpaceTime at all good podcasting apps…including Apple Podcasts (formerly iTunes), audioBoom, Stitcher, PocketCasts, Podbean, Radio Public, Tunein Radio, google play, Spreaker etc RSS feed: https://audioboom.com/channels/4642443.rss Would you prefer to have access to the special commercial free version of SpaceTime? Help support the show, subscribe at Patreon....and share in the rewards. Details at www.patreon.com/spacetimewithstuartgary Help support SpaceTime : The SpaceTime with Stuart Gary merchandise shop. Get your T-Shirts, Coffee Cups, badges, tote bag + more and help support the show. Check out the range: http://www.cafepress.com/spacetime Thank you. Plus: As a part of the SpaceTime family, you can get a free audio book of your choice, plus 30 days free access from audible.com. Just visit www.audibletrial.com/spacetime or click on the banner link at www.spacetimewithstuartgary.com Email: [email protected] Join our mailing list at http://www.bitesz.com/join-our-mailing-list

Scientists are attempting to model some of the most powerful explosions in the universe by miniaturizing them into lab experiments. A team used the intense Gemini laser at the Rutherford Appleton Laboratory in the UK, with a special setup for studying what’s called an “electron-positron plasma beam,” or EPB. These beams seem to be creating strong, long-lasting magnetic fields. Scientists were able to observe, for the first time, some of the key phenomena that play a major role in the generation of gamma ray bursts, such as the self-generation of magnetic fields that lasted for a long time. In the universe, Gamma Ray Bursts occur with supernovae, or when massive stas explode. They are also caused by black holes. https://gizmodo.com/scientists-create-miniature-gamma-ray-bursts-to-study-b-1822115741 http://www.wochit.com This video was produced by YT Wochit News using http://wochit.com

On Aug. 17, the Gamma-ray Burst Monitor on NASA's Fermi Gamma-ray Space Telescope saw a short burst of gamma rays a smashup of neutron stars, marking the first-ever detection of light from a gravitational wave source. NASA scientists Colleen Wilson-Hodge and Tyson Littenberg explain what happened and what it means for science and discovery.

UC Berkeley theoretical astrophysicist Daniel Kasen describes how the neutron star collision was discovered and what its debris is comprised of. --- Full story: https://www.space.com/38493-gravitational-waves-neutron-star-gold.html Credit: Video by Roxanne Makasdjian and Stephen McNally Music: "Wonder Cycle" by Chris Zabriskie

Fermi Gamma-ray Space Telescope has found a signal at the center of the neighboring Andromeda Galaxy that could indicate the presence of the mysterious stuff known as dark matter. The gamma-ray signal is similar to one seen by Fermi at the center of our own Milky Way galaxy. Gamma rays are the highest-energy form of light, produced by the universe’s most energetic phenomena. They’re common in galaxies like the Milky Way because cosmic rays, particles moving near the speed of light, produce gamma rays when they interact with interstellar gas clouds and starlight. Surprisingly, the latest Fermi data shows the gamma rays in Andromeda also known as M31 are confined to the galaxy’s center instead of spread throughout. To explain this unusual distribution, scientists are proposing that the emission may come from several undetermined sources. One of them could be dark matter, an unknown substance that makes up most of the universe. Subscribe for more Space wonders on ΥουΤυbe: https://tinyurl.com/SpaceTelescopesYouTube

Stream Episodes on demand from www.bitesz.com or www.spacetimewithstuartgary.com (both mobile friendly) *The Milky Way’s mysterious gamma ray glow solved A mysterious gamma-ray glow coming from the centre of the Milky Way is most likely caused by a sea of pulsars. The findings cast doubt on previous ideas that the glow might be evidence of dark matter -- a mysterious invisible substance that accounts for 85 percent of all matter in the universe -- but which has so far evaded detection. *Gravitationally lensed supernova Astronomers have discovered their first gravitationally lensed thermonuclear supernova. The new observations provide new ways of studying the accelerating expansion of the Universe due to a mysterious force called dark energy – as well as gravity and distribution of a mysterious substance called dark matter across the cosmos. *Cassini finds big empty close to Saturn NASA’s Cassini scientists say the region between Saturn and its rings is relatively dust free. However, the discovery made during Cassini’s first plunge inside the rings has come as somewhat of a surprise. *SpaceX launches its first spy satellite SpaceX has successfully launched its first top secret spy satellite for the National Reconnaissance Office. It was a case of second time lucky for the classified payload after a faulty first stage liquid oxygen temperature sensor detected an anomaly the previous day resulting in the launch being scrubbed. The NROL-76 payload was blasted into orbit aboard a Falcon 9 rocket from pad 39A at the Kennedy Space Centre at the Cape Canaveral Air Force Base in Florida. The video for the SpaceX launch is https://www.youtube.com/watch?v=DUcNq1PhPQk For Enhanced Show Notes, including photos to accompany this episode: http://www.bitesz.com/spacetime-show-notes Subscribe, rate and review SpaceTime at all good podcasting apps…including iTunes, audioBoom, Stitcher, Pocketcasts, Podbean, Radio Public, Tunein Radio, google play, etc. RSS feed: https://audioboom.com/channels/4642443.rss Help support SpaceTime : The SpaceTime with Stuart Gary merchandise shop. Get your T-Shirts, Coffee Cups, badges, tote bag + more and help support the show. Check out the range: http://www.cafepress.com/spacetime Thank you. Plus: Get a free audio book of your choice, plus 30 days free access from audible.com. Just visit www.audibletrial.com/spacetime or click on the banner link at www.spacetimewithstuartgary.com Email: [email protected] Join our mailing list at http://www.bitesz.com/join-our-mailing-list For more, follow SpaceTime on Facebook, twitter, Tumblr, YouTube, Google+ and Clammr: Facebook: @spacetimewithstuartgary twitter: @stuartgary Tumblr: http://spacetimewithstuartgary.tumblr.com/ Google+: https://plus.google.com/u/2/collection/cabtNB YouTube: https://www.youtube.com/playlist?list=PLhpBkuHSLfIRnliLB12HoC1QE0rwr8qRS Clammr: http://www.clammr.com/app/spacetime If you're enjoying SpaceTime, please help out by sharing and telling your friends. The best recommendation I can get is one from you. Thank you... #astronomy #space #science #technology #news #astrophysics #NASA #cassini

NASA's Fermi Gamma-ray Space Telescope has found a signal at the center of the neighboring Andromeda galaxy that could indicate the presence of the mysterious stuff known as dark matter. The gamma-ray signal is similar to one seen by Fermi at the center of our own Milky Way galaxy. Gamma rays are the highest-energy form of light, produced by the universe's most energetic phenomena. They're common in galaxies like the Milky Way because cosmic rays, particles moving near the speed of light, produce gamma rays when they interact with interstellar gas clouds and starlight. Surprisingly, the latest Fermi data shows the gamma rays in Andromeda, also known as M31, are confined to the galaxy's center instead of spread throughout. To explain this unusual distribution, scientists are proposing that the emission may come from several undetermined sources. One of them could be dark matter, an unknown substance that makes up most of the universe. NASA's Fermi telescope has detected a gamma-ray excess at the center of the Andromeda galaxy that's similar to a signature Fermi previously detected at the center of our own Milky Way. Watch to learn more. Credit: NASA's Goddard Space Flight Center/Scott Wiessinger Music: "Lost Time" from Killer Tracks For more information: https://www.nasa.gov/feature/goddard/2017/nasas-fermi-finds-possible-dark-matter-ties-in-andromeda-galaxy This video is public domain and along with other supporting visualizations can be downloaded from the Scientific Visualization Studio at: http://svs.gsfc.nasa.gov/12505 If you liked this video, subscribe to the NASA Goddard YouTube channel: http://www.youtube.com/NASAExplorer Or subscribe to NASA’s Goddard Shorts HD Podcast: http://svs.gsfc.nasa.gov/vis/iTunes/f0004_index.html Follow NASA’s Goddard Space Flight Center · Facebook: http://www.facebook.com/NASA.GSFC · Twitter http://twitter.com/NASAGoddard · Flickr http://www.flickr.com/photos/gsfc/ · Instagram http://www.instagram.com/nasagoddard/ · Google+ http://plus.google.com/+NASAGoddard/posts

NASA’s Juno spacecraft made its latest close flyby of Jupiter Feb. 2 -- passing about 2,700 miles above the planet’s clouds. This was the fourth close flyby since Juno began orbiting Jupiter last year on July 4. During these close passes instruments on the spacecraft probe beneath the cloud cover to collect scientific data about the planet's structure, atmosphere and magnetosphere. This information could help us better understand the planetary systems being discovered around other stars. Also, Cassini Sees Saturn’s Rings in Greater Detail, The Most Extreme Blazars, NASA at Super Bowl Event, NASA at NBA Black Heritage Celebration, and Day of Remembrance!