The Mickey Way on the Night Sky

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Galaxies grow hierarchically, which means they eat their smaller neighbors. The Mickey way contains something like 200 to 400 billion stars. When we look at the night sky, what we see as the Mickey way band on the sky is actually the inner spiral arm of our galaxy. Do you feel small when you think about that?

Anna Frebel is an astronomer and astrophysicist at MIT. Please support this podcast by checking out our sponsors:
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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