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.

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

WSF Landing Page: https://www.worldsciencefestival.com/...

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:   / worldsciencefestival  
FOLLOW us on Twitter:   / worldscifest  
#worldsciencefestival #cosmology #hubbletelescope #jameswebbspacetelescope #briangreene