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Cosmology in Crisis? Confronting the Hubble Tension

2024-07-12 Science & Technology
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Description

How fast is the universe expanding? Two prominent approaches are finding different answers, propelling cosmology toward a crisis. Wendy Freedman, a renowned astronomer who has spent decades seeking the expansion rate, joins Brian Greene to discuss the latest thinking on this so-called Hubble Tension. This program is part of the Big Ideas series, supported by the John Templeton Foundation. Participant: 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 WSF Landing Page: https://www.worldsciencefestival.com/programs/cosmology-in-crisis-confronting-the-hubble-tension/ - SUBSCRIBE to our YouTube Channel and "ring the bell" for all the latest videos from WSF - VISIT our Website: http://www.worldsciencefestival.com - LIKE us on Facebook: https://www.facebook.com/worldsciencefestival - FOLLOW us on Twitter: https://twitter.com/WorldSciFest #worldsciencefestival #cosmology #hubbletelescope #jameswebbspacetelescope #briangreene

Top Comments (10)

@BlaTaN 2024-07-12

Just saying - 36mins is NOT long enough , we need longer interviews with more detailed explanations as possible. This shouldn't suffer the a.d.h.d. that the rest of the internet does. Just sayin'

241 32 replies
@yeti9127 2024-07-13

I always find solace in such discussions whenever I find politics and social media cesspool repugnant and disgusting. 😅

79 15 replies
@kiwiklogg 2024-07-14

Wendy Freedman is brilliant! She explains concepts so clearly.

65 2 replies
@suyapajimenez516 2024-07-13

I like so much when a panelist talk so clearly about their expertise. Thanks Prof. Green for let her shine.

61 3 replies
@DeltaV11 2024-07-15

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.

31 6 replies
@FAAMS1 2024-07-12

A very concise and digestible explanation of the history of the Hubble tension. Lets see where the future will lead us!

30 1 replies
@obiwanduglobi6359 2024-07-13

Highly appreciated. Thank you very much!

15
@thedouglasw.lippchannel5546 2024-07-13

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.

12
@StefanMochnacki 2024-07-15

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).

7
@wazzahitsIzi 2026-02-21

Having watched a whole ton of these great WSF videos, I cannot overstate the impact Brian Greene has had on these interviews. He's got the whole nine yards, the credentials, quick wit and great sense of humor. So much appreciated.

2

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