The cosmic distance ladder with Terence Tao, part 2
How we know the distances to the planets, stars, and faraway galaxies.Instead of sponsored ad reads, these lessons are funded directly by viewers: https://3b1b.co/support
FAQ with added details and corrections: https://terrytao.wordpress.com/2025/02/13/cosmic-distance-ladder-video-with-grant-sanderson-3blue1brown-commentary-and-corrections/
An equally valuable form of support is to simply share the videos.
Terry and his collaborator Tanya have an Instagram about the cosmic distance ladder: https://www.instagram.com/cosmic_distance_ladder/
Artwork of Guillaume Le Gentil by Kurt Bruns
Artwork of Antonia Maury and Henrietta Leavitt by Talia Gershon: https://bit.ly/taliagershonart
Timestamps:
0:00 - Intro
1:04 - Distance to Venus
7:30 - Speed of light
10:08 - Nearby stars
13:20 - The Milky Way
18:14 - Nearby Galaxies
19:44 - Distant Galaxies
22:42 - Lingering mysteries
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These animations are largely made using a custom Python library, manim. See the FAQ comments here:
https://3b1b.co/faq#manim
https://github.com/3b1b/manim
https://github.com/ManimCommunity/manim/
All code for specific videos is visible here:
https://github.com/3b1b/videos/
The music is by Vincent Rubinetti.
https://www.vincentrubinetti.com
https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown
https://open.spotify.com/album/1dVyjwS8FBqXhRunaG5W5u
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