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  • Fakten zum Einschlafen – Das Universum

    Was passiert mit den Sieben Schwestern, wenn die hellsten Sterne sterben? - Leben, Tod und Reflexionsnebel der Plejaden | Fakten zum Einschlafen - Das Universum

    Am Winterhimmel zieht ein kleiner, dichter Sternhaufen die Aufmerksamkeit auf sich, den Kulturen weltweit seit Jahrtausenden als die Sieben Schwestern kennen. Die Plejaden erscheinen uns als feste, ewige Formation, doch diese Vertrautheit trügt. In Wahrheit handelt es sich um eine kosmische Familie, die sich bereits mitten in einem langen Abschied befindet. Die Episode beleuchtet, warum diese Sterne wirklich zusammengehören und durch welche Mechanismen der Haufen langsam seine Gestalt verliert. Dabei wird deutlich, dass ausgerechnet die massereichen, leuchtstarken Sterne, die das Bild des Haufens prägen, am schnellsten verbrennen und ihm bald fehlen werden. Gleichzeitig rückt ein zweites Phänomen in den Fokus: der zarte blaue Nebelschleier, der die Sterne umgibt und sich nicht, wie lange angenommen, aus ihrem Geburtsmaterial speist, sondern das Resultat einer zufälligen Begegnung mit interstellarem Staub ist. Bei der Arbeit an dieser Episode kehrte ich immer wieder zu einer grundlegenden Frage zurück: Wie gehen wir mit dem Wissen um Vergänglichkeit um, wenn es sich um Objekte handelt, die wir für ewig hielten? Die Plejaden lehren uns eine Art kosmische Achtsamkeit. Sie zeigen, dass das Universum keine Dauerhaftigkeit verspricht, sondern nur Gegenwart. Wir beobachten dieses Familienfoto genau im richtigen Moment, bevor sich die Geschwister zerstreuen. Es ist ein Gedankenexperiment über das Werden und Vergehen, das uns dazu einlädt, den Nachthimmel nicht als statische Kulisse zu betrachten, sondern als einen fortlaufenden Prozess, den wir für eine kurze Zeit bezeugen dürfen.

    Yesterday · 29 min
  • Universe Today Podcast

    [Space Bites+] Turns Out, Superflares Are Quite Possible for Our Sun

    BONUS STORY STARTS AT 15:59 Watch here (with no ads) or on YouTube: https://youtu.be/pkZ5tjeeiS0 00:00 Intro 00:33 Superflares are on the table https://www.universetoday.com/articles/the-sun-is-physically-capable-of-producing-a-superflare-according-to-a-new-study 04:10 Direct image of the youngest exoplanet ever https://www.universetoday.com/articles/astronomers-directly-image-the-youngest-exoplanet-ever 05:56 Weather report for exoplanets https://www.universetoday.com/articles/researchers-develop-a-way-to-check-the-weather-on-a-exoplanet 07:34 Zombie white dwarf https://www.universetoday.com/articles/a-zombie-white-dwarf-star-is-born-again-hallelujah 08:55 More on LRDs https://www.universetoday.com/articles/little-red-dots-are-the-seeds-of-quasars-and-supermassive-black-holes 11:10 Vote results 11:35 Smashed icy moons https://www.universetoday.com/articles/smashed-icy-moons-cool-too-rapidly-to-retain-oceans 13:57 Early galaxies https://www.universetoday.com/articles/a-rare-distant-clump-of-early-galaxies-reveals-ancient-cosmic-secrets 15:59 Bonus story https://www.universetoday.com/articles/earths-center-of-mass-drifts-less-than-we-thought 18:47 Final thoughts

    Yesterday · 21 min
  • PBS Space Time

    The NEW Crisis in Cosmology

    PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ https://www.patreon.com/pbsspacetime I have good news and bad news. Bad news first: two years ago we reported on the Crisis in Cosmology. Since then, it’s only gotten worse. And actually, the good news is also that the crisis in cosmology has actually gotten worse, which means we may be onto something! The most exciting thing for any scientist is when something they thought they knew turns out to be wrong. So it’s no wonder that many cosmologists are starting to get excited by what has become known as the Hubble tension, or the crisis in cosmology. The “crisis” is the fact that we have two extremely careful, increasingly precise measurements of how fast the universe is expanding which should agree with each other, and yet they don’t. Original Crisis in Cosmology https://youtu.be/72cM_E6bsOs Sabine Hossenfelder's episode "Do we travel through time at the speed of light?" https://youtu.be/iBTez-nTKes Check out the Space Time Merch Store https://www.pbsspacetime.com/shop Sign up for the mailing list to get episode notifications and hear special announcements! https://mailchi.mp/1a6eb8f2717d/spacetime Hosted by Matt O'Dowd Written by Matt Caplan & Matt O'Dowd Graphics by Leonardo Scholzer, Yago Ballarini, Pedro Osinski, Adriano Leal & Stephanie Faria GFX Visualizations: Katherine Kornei Directed by Andrew Kornhaber Assistant Producer: Setare Gholipour Executive Producers: Eric Brown & Andrew Kornhaber Standard Candle Definition https://astronomy.swin.edu.au/cosmos/s/Standard+Candle End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0Q Special Thanks to Our Patreon Supporters Big Bang Rick DeWitt Sandy Wu Matthew Miller Brodie Rao Scott Gray Ahmad Jodeh Radu Negulescu Alexander Tamas Morgan Hough Juan Benet Fabrice Eap Mark Rosenthal David Nicklas Quasar Supporters Hank S Christina Oegren Mark Heising Vinnie Falco Hypernova william bryan Scott Gorlick Nick Berard Paul Stehr-Green Leo Emerson muON Marketing Russell Pope Ben Delo L. Wayne Ausbrooks Nicholas Newlin Adrian Posor Mark Matthew Bosko Антон Кочков Alec S-L John R. Slavik Mathew Danton Spivey Donal Botkin John Pollock Edmund Fokschaner Joseph Salomone Matthew O'Connor chuck zegar Jordan Young m0nk John Hofmann Timothy McCulloch Gamma Ray Burst Supporters Andrew Macleod Diana S Douglas Drane Ben Campbell Lawrence Tholl, DVM Faraz Khan Almog Cohen Alex Edwards Nick Ádám Kettinger Sylvain Leduc Anthony Kahng MD3 Endre Pech Daniel Jennings Cameron Sampson Pratik Mukherjee Geoffrey Clarion Nate Darren Duncan Lily kawaii Russ Creech Jeremy Reed Derek Davis Eric Webster Steven Sartore DrJYou David Johnston J. King Michael Barton Christopher Barron James Ramsey Drew Hart Justin Jermyn Mr T Andrew Mann Jeremiah Johnson fieldsa eleanory Peter Mertz Kevin O'Connell Richard Deighton Isaac Suttell Devon Rosenthal Oliver Flanagan Dawn M Fink Bleys Goodson Darryl J Lyle Robert Walter Bruce B Ismael Montecel Simon Oliphant Mirik Gogri Mark Daniel Cohen Brandon Lattin Nickolas Andrew Freeman Shane Calimlim Tybie Fitzhugh Robert Ilardi Astaurus Eric Kiebler Craig Stonaha Martin Skans Michael Conroy Graydon Goss Frederic Simon Tonyface John Robinson A G Kevin Lee Adrian Hatch Yurii Konovaliuk John Funai Cass Costello Geoffrey Short Bradley Jenkins Kyle Hofer Tim Stephani Luaan AlecZero Cody Malte Ubl King Zeckendorff Nick Virtue Scott Gossett Martin J Lollar Dan Warren Patrick Sutton John Griffith Daniel Lyons DFaulk GrowingViolet Kevin Warne Andreas Nautsch Brandon labonte Learn more about your ad choices. Visit megaphone.fm/adchoices

    Yesterday · 23 min
  • PBS Space Time

    Theory of Everything Controversies: Livestream

    PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ The second in our two event series about Theories of Everything! Watch the first one: https://www.youtube.com/watch?v=_izocEgArtQ Please subscribe to Brian Keating's YouTube Channel to watch one-on-one interviews with the guest speakers and more: https://www.youtube.com/DrBrianKeating Existing Theories of Everything have not yet produced experimental evidence that solves the fundamental challenges facing physics. That lack of progress has opened up a sea of controversy, from disagreements about the very necessity of TOEs, to questioning the cost/benefit of mega-billion dollar particle accelerators in search of them, to the emergence of competing TOEs from physicists outside of the academic community. In this 90 minute chat we dive into the existential questions around TOEs. Special thanks to Brian Keating, Lee Smolin, Sabine Hossenfelder, and Eric Weinstein for helping us create this great event. Our Guests' Work: Sabine Hossenfelder YouTube Channel: https://www.youtube.com/SabineHossenfelder Lost in Math: How Beauty Led Physics Astray: https://www.basicbooks.com/titles/sabine-hossenfelder/lost-in-math/9781541646766/ Eric Weinstein The Portal Podcast: https://ericweinstein.org/ The Portal Wiki: https://projects.theportal.wiki/ Lee Smolin Einstein's Unfinished Revolution: The Search for What Lies Beyond the Quantum https://www.amazon.com/Einsteins-Unfinished-Revolution-Search-Quantum/dp/1594206198/ref=sr_1_1?dchild=1&keywords=lee+smolin&qid=1597087375&s=books&sr=1-1 Time Reborn: From the Crisis in Physics to the Future of the Universe https://www.amazon.com/Time-Reborn-Lee-Smolin/dp/0544245598/ref=sr_1_2?dchild=1&keywords=lee+smolin&qid=1597087375&s=books&sr=1-2 Three Roads to Quantum Gravity https://www.amazon.com/gp/product/0465094546/ref=dbs_a_def_rwt_hsch_vapi_tpbk_p1_i3 The Trouble With Physics: The Rise of String Theory, The Fall of a Science, and What Comes Next https://www.amazon.com/gp/product/061891868X/ref=dbs_a_def_rwt_hsch_vapi_tpbk_p1_i2 The Life of the Cosmos https://www.amazon.com/gp/product/0195126645/ref=dbs_a_def_rwt_hsch_vapi_tpbk_p1_i4 Learn more about your ad choices. Visit megaphone.fm/adchoices

    Yesterday · 1 hr 30 min

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