PBS Space Time

PBS

Space Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth with our astrophysicist host: Matthew O’Dowd. For all business inquiries and sponsorship opportunities please reach out to: pbsspacetime@lighthouseagents.com Matt O'Dowd spends his time studying the universe, especially really far-away things like quasars, super-massive black holes, and evolving galaxies. He uses telescopes in space to do it. Matt completed his Ph.D. at NASA's Space Telescope Science Institute, followed by work at the University of Melbourne and Columbia University. He's now a professor at the City University of New York's Lehman College and an Associate at the American Museum of Natural History's Hayden Planetarium. Previous host Gabe Perez-Giz is an astrophysicist who studies black hole physics. He received his Ph.D. from Columbia University and also hosted PBS Infinite Series. patreon.com/pbsspacetime

  1. 34 min ago

    What If Gravity Remains Non-Quantum?

    Take the PBS Annual Fan Survey: https://to.pbs.org/pbssurvey2023d PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime The holy grail of theoretical physics is to come up with a quantum theory of gravity. But after a century of trying we really have no idea how close we are, or it it's even possible. But we shouldn't feel bad because it turns out that the universe is doing everything it its power to make this as difficult as possible. Or it's telling us that it isn't. Should we take the hint? 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 Search the Entire Space Time Library Here: https://search.pbsspacetime.com/ Hosted by Matt O'Dowd Written by Christopher Pollack & Matt O'Dowd Post Production by Leonardo Scholzer, Yago Ballarini & Stephanie Faria Directed by Andrew Kornhaber Associate Producer: Bahar Gholipour Executive Producers: Eric Brown & Andrew Kornhaber Executive in Charge for PBS: Maribel Lopez Director of Programming for PBS: Gabrielle Ewing Assistant Director of Programming for PBS: John Campbell Spacetime is produced by Kornhaber Brown for PBS Digital Studios. This program is produced by Kornhaber Brown, which is solely responsible for its content. © 2023 PBS. All rights reserved. End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka Space Time Was Made Possible In Part By: Big Bang Sponsors Bryce Fort Peter Barrett David Neumann Sean Maddox Alexander Tamas Morgan Hough Juan Benet Vinnie Falco Fabrice Eap Mark Rosenthal Quasar Glenn Sugden Alex Kern Ethan Cohen Stephen Wilcox Mark Heising Hypernova Stephen Spidle Chris Webb David Giltinan Ivari Tölp NullBlox.ZachryWilsn Kenneth See Gregory Forfa Bradley Voorhees Scott Gorlick Paul Stehr-Green Ben Delo Scott Gray Антон Кочков Robert Ilardi John R. Slavik Donal Botkin Edmund Fokschaner chuck zegar Jordan Young Daniel Muzquiz Gamma Ray Burst Anthony Leon Billy Holland Leonardo Schulthais Senna Lori Ferris James Sadler Dennis Van Hoof Koen Wilde Nicolas Katsantonis Piotr Sarnicki Massimiliano Pala Thomas Nielson Joe Pavlovic Justin Lloyd Chuck Lukaszewski Cole B Combs Andrea Galvagni Jerry Thomas Nikhil Sharma Ryan Moser John Anderson Scott Hannum Bradley Ulis Craig Falls Kane Holbrook Ross Story teng guo Mason Dillon Harsh Khandhadia Susan Albee Matt Quinn Michael Lev Terje Vold James Trimmier Jeremy Soller Paul Wood Joe Moreira Kent Durham Jim Bartosh Ramon Nogueira The Mad Mechanic John H. Austin, Jr. Faraz Khan Almog Cohen Daniel Jennings Russ Creech Jeremy Reed David Johnston Michael Barton Isaac Suttell Oliver Flanagan Bleys Goodson Mark Delagasse Mark Daniel Cohen Shane Calimlim Tybie Fitzhugh Eric Kiebler Craig Stonaha Frederic Simon Tonyface John Robinson Jim Hudson David Barnholdt John Funai Bradley Jenkins Vlad Shipulin Cody Brumfield Thomas Dougherty King Zeckendorff Dan Warren Joseph Salomone Patrick Sutton Learn more about your ad choices. Visit megaphone.fm/adchoices

    What If Gravity Remains Non-Quantum?
  2. 1 hr ago

    Does Axionic Dark Matter Fuse Galaxies Together?

    PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Quantum mechanics is our best theory of the fundamental nature of reality, but it's usually only distinguishable from familiar classical mechanics on the smallest scales. However, there are some fringe cases where its distinct features manifest on scales we can observe—in things like superfluids, or the interiors of collapsed stars. But it’s also possible that our entire galaxy is filled with a reverberating quantum mechanical wave that literally holds the galaxy together—and in fact explains all the dark matter that we see across the universe. And this isn’t even a fringe theory. It’s axionic dark matter. 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 Search the Entire Space Time Library Here: https://search.pbsspacetime.com/ Hosted by Matt O'Dowd Written by Taha Dawoodbhoy & Matt O'Dowd Post Production by Leonardo Scholzer, Yago Ballarini, Adriano Leal & Stephanie Faria Directed by Andrew Kornhaber Associate Producer: Bahar Gholipour Executive Producers: Eric Brown & Andrew Kornhaber Executive in Charge for PBS: Maribel Lopez Director of Programming for PBS: Gabrielle Ewing Assistant Director of Programming for PBS: John Campbell Spacetime is produced by Kornhaber Brown for PBS Digital Studios. This program is produced by Kornhaber Brown, which is solely responsible for its content. © 2023 PBS. All rights reserved. End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka Space Time Was Made Possible In Part By: Big Bang Supporters Bryce Fort Peter Barrett David Neumann Sean Maddox Alexander Tamas Morgan Hough Juan Benet Vinnie Falco Fabrice Eap Mark Rosenthal Quasar Supporters Vivaan Vaka Glenn Sugden Alex Kern Ethan Cohen Stephen Wilcox Christina Oegren Mark Heising Hypernova Supporters Stephen Spidle Chris Webb Ivari Tölp Zachary Wilson Kenneth See Gregory Forfa Kirk Honour Joe Moreira Bradley Voorhees Marc Armstrong Scott Gorlick Paul Stehr-Green Ben Delo Scott Gray Антон Кочков Robert Ilardi John R. Slavik Donal Botkin John Pollock Edmund Fokschaner chuck zegar Jordan Young Daniel Muzquiz Gamma Ray Burst Supporters Jakub Jasinski Robin Bayley Piotr Sarnicki Matthew Oldfield Massimiliano Pala Thomas Nielson Joe Pavlovic Ryan McGaughy Chuck Lukaszewski Edward Hodapp Cole B. Combs Andrea Galvagni Jerry Thomas Nikhil Sharma Ryan Moser John Anderson David Giltinan Scott Hannum Bradley Ulis Craig Falls Kane Holbrook Ross Story teng guo Mason Dillon Matt Langford Harsh Khandhadia Thomas Tarler Susan Albee Frank Walker Matt Quinn Michael Lev Terje Vold James Trimmier Andre Stechert Paul Wood Kent Durham Ramon Nogueira Paul Suchy Ellis Hall John H. Austin, Jr. Diana S Poljar Faraz Khan Almog Cohen Alex Edwards Daniel Jennings Cameron Sampson Jeremy Reed David Johnston Michael Barton Andrew Mann Isaac Suttell Bleys Goodson Robert Walter Mark Delagasse Mark Daniel Cohen Nickolas Andrew Freeman Shane Calimlim Tybie Fitzhugh Eric Kiebler Craig Stonaha Graydon Goss Frederic Simon Dmitri McGuiness John Robinson Jim Hudson Alex Gan David Barnholdt David Neal John Funai Bradley Jenkins Vlad Shipulin Cody Brumfield Thomas Dougherty King Zeckendorff Dan Warren Patrick Sutton John Griffith Dean Faulk Learn more about your ad choices. Visit megaphone.fm/adchoices

    Does Axionic Dark Matter Fuse Galaxies Together?
  3. 2 hr ago

    Why the Muon g-2 Results Are So Exciting!

    PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Support Us On https://www.patreon.com/pbsspacetime When a theory makes a prediction that disagrees with an experimental test, sometimes it means we should throw the theory away. But what if that theory has otherwise produced the most successful predictions in all of physics? Then, that little glitch may be pointing the way to layers of physics deeper than we've yet imagined. Well, FermiLabs Muon G-2 experiment has been chasing the most promising glitch of all, and they've just announced their results. Announcement Results https://theory.fnal.gov/events/event/first-results-from-the-muon-g-2-experiment-at-fermilab Previous Episode of Space Time To Help Understand Muon G-2: Quantum Mechanics Most Incredible Prediction https://www.youtube.com/watch?v=7UwigY4SjKY&ab_channel=PBSSpaceTime Muon g-2 Playlist https://www.youtube.com/playlist?list=PLsPUh22kYmNBpDZPejCHGzxyfgitj26w9 Check out the Space Time Merch Store https://www.pbsspacetime.com/shop Hosted by Matt O'Dowd Written by Dan Garisto & 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 End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0Q Sign up for the mailing list to get episode notifications and hear special announcements! https://mailchi.mp/1a6eb8f2717d/spacetime Big Bang Leo Koguan Rick DeWitt Sandy Wu Matthew Miller Brodie Rao Scott Gray Ahmad Jodeh Radu Negulescu Alexander Tamas Morgan Hough Juan Benet Vinnie Falco Fabrice Eap Mark Rosenthal David Nicklas Quasar Supporter Hank S Christina Oegren Mark Heising Hypernova Supporter william bryan Scott Gorlick Nick Berard Paul Stehr-Green MuOn Marketing Russell Pope Ben Delo L. Wayne Ausbrooks Nicholas Newlin Adrian Posor Антон Кочков John R. Slavik Mathew Danton Spivey Donal Botkin John Pollock Edmund Fokschaner Joseph Salomone chuck zegar Jordan Young m0nk John Hofmann Timothy McCulloch Gamma Ray Burst Supporters The Mad Mechanic Juan David Gil Wiedman Ellis Hall Alexey Kamenskiy John H. Austin, Jr. 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 Russ Creech Jeremy Reed Derek Davis Eric Webster Steven Sartore 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 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 Tristan Deloche Bradley Jenkins Kyle Hofer Tim Stephani Luaan AlecZero Vlad Shipulin 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 william bryan Learn more about your ad choices. Visit megaphone.fm/adchoices

  4. 2 hr ago

    The Universe Itself Might Be Withholding the Gravity Particle From Us

    Head to https://brilliant.org/Spacetime/ to start learning for free for 30 days. Plus, our viewers get 20% off an annual Premium subscription for unlimited daily access to everything Brilliant has to offer. To progress to the next level in understanding reality, we need to combine quantum mechanics and Einstein’s general relativity. And to do that, most physicists believe we need a theory of quantum gravity .. which means we need gravitons. But it also seems like the laws of physics make it impossible to ever detect this quantum particle of gravity. Almost like the universe is set up to keep the final answer forever out of our reach. So, can we outsmart the universe, catch a graviton, and finally solve physics? Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime 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 Search the Entire Space Time Library Here: https://search.pbsspacetime.com/ Hosted by Matt O'Dowd Written by Richard Dyer & Matt O'Dowd Post Production by Leonardo Scholzer Directed by Andrew Kornhaber Associate Producer: Bahar Gholipour Executive Producer: Andrew Kornhaber Executive in Charge for PBS: Maribel Lopez Director of Programming for PBS: Gabrielle Ewing Assistant Director of Programming for PBS: John Campbell Spacetime is a production of Kornhaber Brown for PBS Digital Studios. This program is produced by Kornhaber Brown, which is solely responsible for its content. © 2025 PBS. All rights reserved. End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka Space Time Was Made Possible In Part By: Big Bang Alexander Tamas David Paryente Juan Benet Kenneth See Mark Rosenthal Morgan Hough Peter Barrett Santiago Tj Steyn Vinnie Falco Supernova Ethan Cohen Glenn Sugden Grace Biaelcki Mark Heising Stephen Wilcox Tristan Lucian Claudius Aurelius Tyacke Hypernova Alex Kern Ben Delo Cal Stephens chuck zegar David Giltinan Dean Galvin Donal Botkin Gregory Forfa Jesse Cid Dyer John R. Slavik Justin Lloyd Kenneth See Massimiliano Pala Michael Tidwell Mike Purvis Paul Stehr-Green Scott Gorlick Scott Gray Spencer Jones Stephen Saslow Thomas Mouton Zachary Haberman Антон Кочков Daniel Muzquiz Gamma Ray Burst Aaron Pinto Adrien Molyneux Almog Cohen Anthony Leon Arko Provo Mukherjee Ayden Miller Ben McIntosh Bradley Jenkins Bradley Ulis Brandon Lattin Brian Cook Bryan White Chris Liao Christopher Wade Chuck Lukaszewski Collin Dutrow Craig Falls Craig Stonaha Dan Warren Daniel Donahue Daniel Jennings Daron Woods Darrell Stewart David Johnston Doyle Vann Eric Kiebler Eric Raschke Eric Schrenker Faraz Khan Frederic Simon Harsh Khandhadia Ian Williams Isaac Suttell James Trimmier Jeb Campbell Jeremy Soller Jerry Thomas jim bartosh John Anderson John De Witt John Funai John H. Austin, Jr. John591 Joseph Salomone Junaid Ali Kacper Cieśla Kane Holbrook Keith Pasko Kent Durham Koen Wilde Kyle Atkinson Marcelo Garcia Marion Lang Mark Daniel Cohen Mark Delagasse Matt Kaprocki Matthew Johnson Michael Barton Michael Clark Michael Lev Michael Purcell Nathaniel Bennett Nick Hoffenstoffer III Nicolas Katsantonis Paul Wood Rad Antonov Reuben Brewer Richard Steenbergen Robert DeChellis Ross Story Russell Moore SamSword Sandhya Devi Satwik Pani Sean Owen Shane Calimlim SilentGnome Sound Reason Steffen Bendel Steven Giallourakis Terje Vold Thomas Dougherty Tomaz Lovsin Tybie Fitzhugh Vlad Shipulin William Flinn WILLIAM HAY III Zac Sweers ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Learn more about your ad choices. Visit megaphone.fm/adchoices

    The Universe Itself Might Be Withholding the Gravity Particle From Us
  5. 2 hr ago

    How Black Holes Kill Galaxies

    To learn to think like a scientist check out http://Brilliant.org/SpaceTime PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime Black holes are really only dangerous if you get too close. Ha, who am I kidding. It turns out they may be responsible for ending star formation across the entire universe. Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Leonardo Scholzer Directed by Andrew Kornhaber Produced By: Kornhaber Brown When we first realized that black holes could have masses of millions or even billions of times that of the sun, it came as a bit of a shock. They were discovered as the driving force behind quasars, where matter is heated to extreme incandescence before its plunge into vast black holes. But if that weren’t enough, we soon realized that every single decent-sized galaxy contains such a supermassive black hole. By the beginning of the 21st century it became clear that black holes and the galaxies that contain them are very closely connected. The bigger the galaxy, the bigger its supermassive black hole. That might not sound surprising. What was weird was how closely they were connected. There’s a tight correlation between the mass the central black hole and the mass of the stars in the galactic bulge – that’s the central ball-like part of a spiral galaxy, or the entirety of an elliptical galaxy, and every bulge contains a supermassive black hole around one-one-thousandth its mass. And there’s an even tighter relationship between the black hole mass and the speed that stars are moving in their random orbits within the galactic bulge – the so-called stellar velocity dispersion – which itself depends of the total mass of the galaxy, including dark matter. Big Bang Supporters: Anton Lifshits David Nicklas Fabrice Eap Juan Benet Justin Lloyd Quasar Supporters: Mark Heising Mark Rosenthal Tambe Barsbay Vinnie Falco Hypernova Supporters: Chuck Zegar Danton Spivey Donal Botkin Edmund Fokschaner Hank S John Hofmann John R. Slavik Jordan Young Joseph Salomone kkm Mark Heising Matthew Matthew O'Connor Syed Ansar Gamma Ray Burst Supporters: Adrien Hatch Alexey Eromenko Andreas Nautsch Bradley Jenkins Brandon Labonte Carlo Mogavero Daniel Lyons David Behtala DFaulk Dustan Jones Geoffrey Short James Flowers James Quintero John Funai John Pollock Jonah Jonathan Nesfeder Joseph Dillman Joseph Emison Josh Thomas Kevin Warne Kyle Hofer Malte Ubl Mark Vasile Nathan Hitchings Nick Virtue Paul Rose Ryan Jones Scott Gossett Sigurd Ruud Frivik Tim Jones Tim Stephani Tommy Mogensen Yurii Konovaliuk سلطان الخليفي Learn more about your ad choices. Visit megaphone.fm/adchoices

  6. 3 hr ago

    Electroweak Theory and the Origin of the Fundamental Forces

    PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Our universe seems pretty complicated. We have a weird zoo of elementary particles, which interact through very different fundamental forces. But some extremely subtle clues in nature have led us to believe that the forces of nature were once unified, ruled by a single, grand symmetry. But how does one force separate into multiple? And how do the forces of nature arise from mathematical symmetries in the first place? Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Check out the Space Time Merch Store https://pbsspacetime.com/ 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 Graeme Gossel & Matt O'Dowd Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski Directed by: Andrew Kornhaber Camera Operator: Setare Gholipour Executive Producers: Eric Brown & Andrew Kornhaber End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0Q Special Thanks to Our Patreon List Big Bang Supporters Sean Maddox Marty Yudkovitz Brodie Rao Scott Gray Robert Doxtator Ahmad Jodeh Radu Negulescu Alexander Tamas Morgan Hough Juan Benet Fabrice Eap Mark Rosenthal David Nicklas Quasar Supporters Justin Lloyd Christina Oegren Mark Heising Vinnie Falco Hypernova William Bryan L. Wayne Ausbrooks Nicholas Newlin Mark Matthew Bosko Justin Jermyn Jason Finn Антон Кочков Alec S-L Julian Tyacke Syed Ansar John R. Slavik Mathew Danton Spivey Donal Botkin John Pollock Edmund Fokschaner Joseph Salomone Matthew O'Connor Chuck Zegar Jordan Young m0nk Hank S John Hofmann Timothy McCulloch Gamma Ray Burst Jason Normandin Cameron Sampson Pratik Mukherjee Geoffrey Clarion Astronauticist Nate Darren Duncan Lily kawaii Russ Creech Jeremy Reed Max Bernard Magistrala Хемус [Kybrit] Bill Blair Eric Webster Steven Sartore James Younger David Johnston J. King Michael Barton Christopher Barron James Ramsey 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 M D Andrew Richmond Simon Oliphant Mirik Gogri David Hughes Mark Daniel Cohen Brandon Lattin Yannick Weyns Nickolas Andrew Freeman Brian Blanchard Shane Calimlim Tybie Fitzhugh Robert Ilardi Astaurus Eric Kiebler Tatiana Vorovchenko Craig Stonaha Michael Conroy Graydon Goss Frederic Simon Greg Smith Sean Warniaha 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 Malte Ubl Nick Virtue Scott Gossett David Bethala Dan Warren Patrick Sutton John Griffith Daniel Lyons DFaulk Kevin Warne Andreas Nautsch Brandon labonte Lucas Morgan Learn more about your ad choices. Visit megaphone.fm/adchoices

  7. 3 hr ago

    Does Antimatter Yield Anti-Gravity?

    Learn More About 80,000 Hours at: https://www.80000hours.org/spacetime PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime From hoverboards to flying cars to cloud cities, anti-gravity is a staple of science fiction and our dream of a less Earth-bound future. But in the real universe gravity appears to be a purely attractive force. Feels like its main MO is keeping us stuck to the surface of this lonely rock. But maybe if we science hard enough we can remove the fiction from science fiction. For the sake of our flying cars we should at least try. And for many years, physicists have wondered whether a certain well-known exotic material may experience gravitational repulsion from the Earth. That material is antimatter, and physicists at CERN have just completed a very long and very difficult experiment to answer a seemingly simple question: does antimatter fall down, or does it fall up? 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 Search the Entire Space Time Library Here: https://search.pbsspacetime.com/ Hosted by Matt O'Dowd Written by Christopher Pollack & Matt O'Dowd Post Production by Leonardo Scholzer, Yago Ballarini & Stephanie Faria Directed by Andrew Kornhaber Associate Producer: Bahar Gholipour Executive Producers: Eric Brown & Andrew Kornhaber Executive in Charge for PBS: Maribel Lopez Director of Programming for PBS: Gabrielle Ewing Assistant Director of Programming for PBS: John Campbell Spacetime is a production of Kornhaber Brown for PBS Digital Studios. This program is produced by Kornhaber Brown, which is solely responsible for its content. © 2023 PBS. All rights reserved. End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka Space Time Was Made Possible In Part By: Big Bang Sponsors John Sronce Bryce Fort Peter Barrett David Neumann Alexander Tamas Morgan Hough Juan Benet Vinnie Falco Mark Rosenthal Quasar Sponsors Glenn Sugden Alex Kern Ethan Cohen Stephen Wilcox Mark Heising Hypernova Sponsors Stephen Spidle Chris Webb David Giltinan Ivari Tölp Zachary Wilson Kenneth See Gregory Forfa drollere Bradley Voorhees Scott Gorlick Paul Stehr-Green Ben Delo Scott Gray Антон Кочков Robert Ilardi John R. Slavik Donal Botkin Edmund Fokschaner chuck zegar Jordan Young Matthew Pabst Daniel Muzquiz Gamma Ray Burst Sponsors Max Paladino Robert DeChellis Tomaz Lovsin Anthony Leon Billy Holland Leonardo Schulthais Senna Lori Ferris Dennis Van Hoof Koen Wilde Nicolas Katsantonis Massimiliano Pala Thomas Nielson Joe Pavlovic Justin Lloyd Chuck Lukaszewski Andrea Galvagni Jerry Thomas Nikhil Sharma John Anderson Bradley Ulis Craig Falls Kane Holbrook Ross Story teng guo Harsh Khandhadia Michael Lev Terje Vold James Trimmier comboy Jeremy Soller Paul Wood Joe Moreira Kent Durham jim bartosh Ramon Nogueira John H. Austin, Jr. Diana S Poljar Faraz Khan Almog Cohen Daniel Jennings Russ Creech Jeremy Reed David Johnston Michael Barton Isaac Suttell Oliver Flanagan Bleys Goodson Mark Delagasse Mark Daniel Cohen Shane Calimlim Tybie Fitzhugh Eric Kiebler Craig Stonaha Frederic Simon John Robinson Jim Hudson Alex Gan David Barnholdt John Funai Adrien Molyneux Bradley Jenkins Amy Hickman Vlad Shipulin Cody Brumfield Thomas Dougherty King Zeckendorff Dan Warren Joseph Salomone Patrick Sutton Julien Dubois Learn more about your ad choices. Visit megaphone.fm/adchoices

    Does Antimatter Yield Anti-Gravity?
  8. 4 hr ago

    Could the Universe End by Tearing Apart Every Atom?

    PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Of all the unlikely ends of the universe, the Big Rip has to be the most spectacular. Galaxies ripped to shreds, dogs and cat first living together, then tragically separated by the infinitely accelerating expansion of space on subatomic scales. Good thing it's not going to happen. Or is it? Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime #bigrip #endoftheuniverse #spacetime Learn More About Dark Energy Here: https://www.youtube.com/playlist?list... Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Aaron Halevy Directing by Andrew Kornhaber The universe is expanding, and that expansion is accelerating. We don’t know what’s causing that acceleration, but that hasn’t stopped us from giving it a name. We call this unknown influence dark energy. The observed acceleration is, for the most part, nicely described with a constant density of dark energy – the same amount of this stuff in every block of space. Which means if you increase the volume you increase the overall amount of dark energy – hence accelerating expansion. Mathematically we describe a constant energy density with the cosmological constant in the equations of Einstein’s general theory of relativity. But what if dark energy is NOT constant? What if the energy density in each patch of space increases over time? In that case, the acceleration itself could be … accelerating. That would be bad. Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang: Anton Lifshits coolascats David Nicklas Fabrice Eap Juan Benet Justin Lloyd Tim Davis Quasar: James Flowers Mark Rosenthal Tambe Barsbay Vinnie Falco Hypernova: chuck zegar Danton Spivey Donal Botkin Edmund Fokschaner Jens Theisen John Hofmann Jordan Young Joseph Salomone kkm Mark Heising Matthew O'Connor Thanks to our Patreon Gamma Ray Burst Supporters: Alexey Eromenko Antonio Ruiz Bradley Jenkins Brandon Labonte Buruk Aregawi Carlo Mogavero Daniel Lyons David Behtala David Crane David Schmidt Dustan Jones Geoffrey Short Greg Weiss Jack Frosch James Hughes James Quintero Jinal Doshi JJ Bagnell John Webber Jon Folks Jonah Joseph Emison Josh Thomas Kenneth F Leonard Kevin Warne Kyle Hofer Malte Ubl Mark Vasile Nathan Hitchings Nicholas Rose Nick Virtue Ratfeast Richard Broman Scott Gossett Sigurd Ruud Frivik Tim Crookham Tim Stephani Tommy Mogensen سلطان الخليفي And a round of applause to Andreas Nautsch. Learn more about your ad choices. Visit megaphone.fm/adchoices

About

Space Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth with our astrophysicist host: Matthew O’Dowd. For all business inquiries and sponsorship opportunities please reach out to: pbsspacetime@lighthouseagents.com Matt O'Dowd spends his time studying the universe, especially really far-away things like quasars, super-massive black holes, and evolving galaxies. He uses telescopes in space to do it. Matt completed his Ph.D. at NASA's Space Telescope Science Institute, followed by work at the University of Melbourne and Columbia University. He's now a professor at the City University of New York's Lehman College and an Associate at the American Museum of Natural History's Hayden Planetarium. Previous host Gabe Perez-Giz is an astrophysicist who studies black hole physics. He received his Ph.D. from Columbia University and also hosted PBS Infinite Series. patreon.com/pbsspacetime

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