Cosmawatch · Learn
A structured introduction to astrophysics — from the scale of the universe to the fate of everything. Each chapter ends with a quiz to test your understanding.
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The Scale of the Universe
Just how big is everything out there?
~8m
4q quiz
Stars — Birth, Life, and Death
Everything you are made of was forged in a star.
~12m
5q quiz
Galaxies and the Milky Way
Island universes stretching across the cosmos.
~10m
Black Holes
The universe's most extreme objects.
~11m
The Big Bang and Cosmic History
How everything came to be, from the first microsecond.
~13m
Dark Matter and Dark Energy
The 95% of the universe we cannot see.
Space, Time, and Gravity
Einstein's revolution — how mass shapes the universe.
Exoplanets and the Search for Life
Are we alone in the universe?
The Fate of the Universe
How does it all end?
~9m
3q quiz