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The Big Bang, Cosmology part 1: Crash Course Astronomy #42

2,009 צפיות· 10/24/23
CrashCourse
CrashCourse
2,185 מנויים
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ב Life

Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly it s expanding also allows us to run the clock...

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