The Spectrum of the Sun

2min Snip

00:00

Play full episode

Summary

Transcript

Episode notes

We don't send the starlight through a raindrop that then gets bounced around and splits up the light into the rainbow colors. We, um, we do it with a spectrograph. So basically a prism. The interesting things are the dips. If you think back of the rainbow, what we actually see in our stars is not just a rainbow, but it would be a rainbow with lots of black lines in it. And so we can no longer see it as well.

Anna Frebel is an astronomer and astrophysicist at MIT. Please support this podcast by checking out our sponsors:
– Hexclad Cookware: https://hexclad.com/lex and use code LEX to get 10% off
– Numerai: https://numer.ai/lex
– House of Macadamias: https://houseofmacadamias.com/lex and use code LEX to get 20% off your first order

EPISODE LINKS:
Anna’s Twitter: https://twitter.com/annafrebel
Anna’s Instagram: https://instagram.com/annafrebel
Anna’s Book – Searching for the Oldest Stars: https://amzn.to/3pi2Ci6

PODCAST INFO:
Podcast website: https://lexfridman.com/podcast
Apple Podcasts: https://apple.co/2lwqZIr
Spotify: https://spoti.fi/2nEwCF8
RSS: https://lexfridman.com/feed/podcast/
YouTube Full Episodes: https://youtube.com/lexfridman
YouTube Clips: https://youtube.com/lexclips

SUPPORT & CONNECT:
– Check out the sponsors above, it’s the best way to support this podcast
– Support on Patreon: https://www.patreon.com/lexfridman
– Twitter: https://twitter.com/lexfridman
– Instagram: https://www.instagram.com/lexfridman
– LinkedIn: https://www.linkedin.com/in/lexfridman
– Facebook: https://www.facebook.com/lexfridman
– Medium: https://medium.com/@lexfridman

OUTLINE:
Here’s the timestamps for the episode. On some podcast players you should be able to click the timestamp to jump to that time.
(00:00) – Introduction
(05:26) – First elements
(12:35) – Milky Way
(16:11) – Alien worlds
(19:16) – Protogalaxies
(24:29) – Black holes
(29:27) – Stellar archeology
(38:42) – Oldest stars
(46:32) – Metal-poor stars
(1:02:05) – Neutron capture
(1:07:01) – Neutron stars
(1:12:30) – Dwarf galaxies
(1:17:10) – Star observation
(1:45:27) – James Webb Space Telescope
(1:51:17) – Future of space observation
(1:54:26) – Age of the universe
(2:07:34) – Most beautiful idea in astronomy
(2:11:23) – Advice for young people
(2:20:17) – Meaning of life