Cosmology in Crisis? Confronting the Hubble Tension
196,561
Published 2024-07-12
This program is part of the Big Ideas series, supported by the John Templeton Foundation.
Participants:
Wendy Freedman
Moderator:
Brian Greene
00:00 - Introduction
02:40 - Participant introductions
04:40 - The History of Cosmic Expansion
9:40 - Henrietta Swan Leavitt's Contributions to Cosmology
11:45 - Cepheid variable
15:04 - How did Hubble calculate Expansion Rate?
21:05 - Modern Measurements of Expansion Rate
26:09 - Determining Expansion rate using Microwave Background Radiation
28:30 - Can We Resolve Hubble Tension?
31:46 - James Webb Space Telescope's Impact on Expansion Rate
34:02 - The Future of Cosmology
35:19 - Credits
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All Comments (21)
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Wendy Freedman is brilliant! She explains concepts so clearly.
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A very concise and digestible explanation of the history of the Hubble tension. Lets see where the future will lead us!
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I like so much when a panelist talk so clearly about their expertise. Thanks Prof. Green for let her shine.
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And this right here is why I LOVE science. I feel like most people don’t appreciate the stories behind discoveries and scientific progress. It’s really all about finding how we get it wrong. Where are our errors? How can we correct those errors or make them less impactful? It’s about building on generations of this type of thinking. Science is truly the greatest concept we’ve come up with.
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Anything with Brian Greene is an instant win. Thank you for all you do Dr. Greene!
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Fabulous! Wendy Freedman has such knowledge of the subject. She is following in Vesto Slipher's and Edwin Hubble's footsteps and making many of her own. Where will the Hubble Tension and DESI and Dark Matter and Dark Energy lead Cosmology? As usual Dr. Brian Greene brings the best to the big screen.
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Highly appreciated. Thank you very much!
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how have I not heard of this festival before??!? Thanks Prof Greene; it's always a joy to get one of your talks and thanks to Wendy Freedman for sharing her insights!!.
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Good morning Brian and Wendy Difficult, always worth doing. Truly grateful for your shared work. 💜
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This was a very clear and concise introduction to the subject of determining the Hubble constant, concentrating on the fundamental calibration of the distance scale using stars in nearby galaxies (the work Wendy Freedman and Barry Madore have done, beginning in Bob McLaren's infrared lab at the University of Toronto in the early 1980's).
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An amazing presentation about the amazing story of the expansion of sky in cosmology by two brilliant thinkers. Thanks, well done.
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When I think of the " Atlas of the Universe" I had in 69 by Patrick Moore.....knowledge is just expanding at the speed of light....no book could keep up ...I learn SO much these days...
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Excellent, entertaining discussion between two experts of a truly fascinating subject. Thank you Profs Freedman and Greene!
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Awesome conversation by experts that is clear and transparent. Thanks!
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Loved everything from guest " questions ,and explanations ,and the patience for explaining the universe to us not so bright 😊
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Fantastic, fantastic, fantastic! Even for the layman afficionada. Well done!
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This is a fantastic episode! Thank you Brian Greene !
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Amazing, great information, thank you. Interestingly, I did not know about Carbon Stars and Carbon Planets too 🙏
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Hi, Wendy one of the best, lots of knowledge.....
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...beautiful Wendy.....thank you so much.....absolutely brilliant......
