Astrophysics & cosmology
2 resources
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⬡ Website
Video series
Problem sets & exercises
Astronomy - Khan Academy
The scale of the universe stars galaxies black holes the Big Bang and the fate of the cosmos with built-in practice.
F
▶ YouTube
Lecture series
Frontiers / Controversies in Astrophysics - Yale (Bailyn)
Yale ASTR 160 covering exoplanets black holes and dark energy designed for non-scientists.