Adam Riess

What does it feel like to make one of the biggest discoveries in physics? Adam Riess knows — because his work revealed that the universe isn’t just expanding, it’s accelerating. In this episode, the Nobel Prize–winning astrophysicist takes us behind the scenes of the moment that changed cosmology forever. How did his team use exploding stars as “standard candles” to measure the cosmos? Why did the data point to a mysterious force now called dark energy, making up nearly 70% of the universe? And what’s behind today’s biggest cosmic puzzle: the Hubble tension? Plus, Adam shares what new telescopes could uncover — and why the next decade might rewrite the laws of physics all over again. Learn more about NOVA and subscribe to our YouTube channel. ————————— Guest Bio: Adam Riess is an astrophysicist, professor at Johns Hopkins University, and a distinguished astronomer at Space Telescope Science Institute. In 2011, he was named as a co-winner of the Nobel Prize in Physics for his contributions to the discovery that the expansion rate of the universe is accelerating. Since then, he has continued refining measurements of cosmic expansion and the Hubble constant, aiming to find and measure the most distant type Ia supernovae known, to probe the origin of cosmic acceleration. Timestamps (00:00:00) Introduction (00:03:16) What Is a Type Ia Supernova? (00:10:52) The Discovery of Dark Energy (00:44:39) What Is the Hubble Tension? (00:58:59) Winning a Nobel Prize (01:15:32) Credits

What does it feel like to make one of the biggest discoveries in physics? Adam Riess knows — because his work revealed that the universe isn’t just expanding, it’s accelerating. In this episode, the Nobel Prize–winning astrophysicist takes us behind the scenes of the moment that changed cosmology forever. How did his team use exploding stars as “standard candles” to measure the cosmos? Why did the data point to a mysterious force now called dark energy, making up nearly 70% of the universe? And what’s behind today’s biggest cosmic puzzle: the Hubble tension? Plus, Adam shares what new telescopes could uncover — and why the next decade might rewrite the laws of physics all over again. Learn more about NOVA and subscribe to our YouTube channel. ————————— Guest Bio: Adam Riess is an astrophysicist, professor at Johns Hopkins University, and a distinguished astronomer at Space Telescope Science Institute. In 2011, he was named as a co-winner of the Nobel Prize in Physics for his contributions to the discovery that the expansion rate of the universe is accelerating. Since then, he has continued refining measurements of cosmic expansion and the Hubble constant, aiming to find and measure the most distant type Ia supernovae known, to probe the origin of cosmic acceleration. Timestamps (00:00:00) Introduction (00:03:16) What Is a Type Ia Supernova? (00:10:52) The Discovery of Dark Energy (00:44:39) What Is the Hubble Tension? (00:58:59) Winning a Nobel Prize (01:15:32) Credits

How did scientists discover evidence for dark energy? Neil deGrasse Tyson and comedian Paul Mecurio explore dark energy, Hubble tension, and the beginning and end of the universe with astrophysicist and Nobel laureate, Adam Riess. NOTE: StarTalk+ Patrons can listen to this entire episode commercial-free here: https://startalkmedia.com/show/origins-of-dark-energy-with-adam-riess/ Thanks to our Patrons micpoc, Nathan, Matthew, Aislynn Schaffer, Mark Domino, Lou Wheeland, Matrograde, Elliott Natale, Machael Lipovski, Mathew Moore, Tony, Pablo P, Toni, Brian Futterman, quantumAnomaly, Robin Steiner, Errol Norwitz, Donovan Meek, Alan Geist, Sriganesh Arunanthi, Nuno Abreu, Ross Ziobro, Petr Doležal, Mandar Parikh, Bryan Tollin, Fooj, David Bozarth, Kolja Dobrindt, Sean Poplawski, Brad Durbin, Christian Nielsen, Zen Kurokawa, Lương Tiến, Joel Arbuckle, Chad L Ingham, Mark Morris, dylndmg, Derrick Korstick, EleanorRigbyy, Tarun C, Larry Infante, Jaclyn Anderson, Dave, Kayla Finch, The Bayside Volunteer Jam Band, Dale Allen Platt, Raymond Boulay, Lawrence Zeller, David, Kim Matthews, Jon Gefen, Mark A. Hasty, Clifford Dedmore, Mario De La Crus and Brianni Massin, jordan visina, Ryan Brown, Sebastian H, Daniel Voth, Karen Hollis, Josua Ennis, Julius Adams, Christie L Hall, Filip Risteski, scottdunbar_io, Samantha Davis, Don Franks, Corey Butler, Josh Jones, Daniel Vilasuso, J MR, joe, I Am Austin, bobmac69, Anthony cole, Zan, Erik LeRoy, Kevin George, Arman Adei, Christopher Pickett, John Morlock, AllTheScience, Juana Bee, Jeff Chastain, Jaimal Eiseman, Ed Matte, Lorkhan, D, roninraver, z67760, Orghanik Productions, and CubedWombat for supporting us this week. Subscribe to SiriusXM Podcasts+ to listen to new episodes of StarTalk Radio ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus . Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Our universe is expanding. But when physicists measure how fast this expansion rate is, they get two different answers. Hear what this crisis means from Nobel Prize winner Adam Riess. For ask-us-anything segments and other exclusives, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse Our merch is available here: https://www.shalmawegsman.com/why-this-universe Support the show

Adam Riess recounts the moments of his Nobel prize-winning discovery that our universe is expanding at an accelerating rate, powered by a mysterious energy source called dark energy. For ask-us-anything segments and other exclusives, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse Our merch is available here: https://www.shalmawegsman.com/why-this-universe Support the show

Join my mailing list https://briankeating.com/list to win a real 4 billion year old meteorite! All .edu emails in the USA 🇺🇸 will WIN! What is the Hubble tension? How does it challenge our current understanding of the universe? Why do different methods of measuring the universe’s expansion yield different results? And does our cosmological model need a complete overhaul? I had the honor of discussing all this and more with none other than Adam Riess. Riess is a renowned astrophysicist who won the Nobel Prize in Physics for his groundbreaking research on the expansion of the universe. Through extensive measurements and collaborations with other scientists, Riess discovered an intriguing tension in the size of the expansion of the universe, which has been steadily increasing over the last decade. These results, which have reached a significant level of more than 5 sigma, have revealed an unexpected phenomenon: the universe's expansion rate seems to vary depending on whether we start from the beginning shortly after the Big Bang or from the present. In this episode of Into the Impossible, Riess and I explore the challenges of measuring distances in the universe, the possible role of dark energy, and how this challenges the concept of the cosmological principle. Tune in! Key Takeaways: 00:00 Intro 01:03 Proving Einstein wrong 06:38 Struggling with experiment results 08:57 What is the Hubble tension? 18:45 Can curiosity be cultivated and sustained? 24:05 Measuring distances in the universe using parallax 32:54 The Hubble tension persists 38:56 Revising the cosmological principle 42:47 Gravitational lensing 51:03 Surprising JWST findings 54:33 Theoretical implications of the Hubble Tension measurements 56:47 Outro — Additional resources: 📝 Get one month of Snipd Premium for free with this link: https://get.snipd.com/Cx7S/brianSnipd Snipd lets you take Smart Notes 🧠 with AI 💡 — it’s my favorite podcast player 😀 ! ➡️ Follow me on your fav platforms: ✖️ Twitter: https://twitter.com/DrBrianKeating 🔔 YouTube: https://www.youtube.com/DrBrianKeating?sub_confirmation=1 📝 Join my mailing list: https://briankeating.com/list ✍️ Check out my blog: https://briankeating.com/cosmic-musings/ 🎙️ Follow my podcast:<a href="https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbmUyZmhlUkh2eU9jNW9qR1QyVlNLb3kwb250QXxBQ3Jtc0tsclVncUFKZmI3ekxGMlNvR2Z6dTR3LW