# @worldsciencefestival on YouTube

- **Type:** Video
- **Original URL:** https://youtube.com/watch?v=CQ-4-MWa7Xw
- **Gondola URL:** https://gondola.cc/posts/24331922-worldsciencefestival-youtube
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/thumbnails/a0d2b9a96c.jpg
- **Posted:** 2024-07-12T20:00:06.000+00:00
- **Account Owner:** WorldScienceFestival (@WorldSciFest) — https://gondola.cc/WorldSciFest

## Caption

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

## Stats

- **Views:** 241,698
- **Likes:** 4,892
- **Shares:** 0
- **Comments:** 557

## Tags

jameswebbspacetelescope, hubbletelescope, cosmology, worldsciencefestival, briangreene

---
Copyright (c) Gondola