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

2,009 विचारों· 10/24/23
CrashCourse
CrashCourse
2,185 ग्राहकों
2,185
में 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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