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Distances: Crash Course Astronomy #25

Season 1 Episode 25

About the Episode

How do astronomers make sense out of the vastness of space? How do they study things so far away? Today Phil talks about distances, going back to early astronomy. Ancient Greeks were able to find the size of the Earth, and from that the distance to and the sizes of the Moon and Sun.

Aired: 07/15/15 | Expires: | Runtime: 11m 20s
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