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Crash Course Astronomy

1 Season
46 Episode

Crash Course Astronomy - Season 1 Episode 42 The Big Bang, Cosmology Part 1


(1 votes, average: 8.00/ 10)

12 minutes 2025 HD

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Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly its expanding also allows us to run the clock backwards 14 billion years to the way the universe began - with a bang.

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Season 1

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