Lesson 3 of 5Module 1 · 0% of course
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Explore › Science › Astronomy & Earth › Space
Astronomy & Earth · Space

Galaxies & the Big Bang

Our place in the universe: the Milky Way and billions of other galaxies, Hubble's discovery of expansion, the 13.8-billion-year history from the Big Bang, the cosmic microwave background, and the mysteries of dark matter and dark energy.

35 min · 6 steps · videoJump to quiz ↓
The Universe: Countless Wonders of the Milky Way (S2, E4) | Full Episode | History HISTORY · 45 min
Open in YouTube
Step 1 of 6 · Overview35 min read ·
Key idea
Prereqs: Black holes; Light & waves. Next: History of science. Sources: NASA and ESA (Planck), PBS Space Time, Steven Weinberg's *The First Three Minutes*, Hubble (1929).
Next: 1. Galaxies

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