Crash Course Astronomy Distances - Search Videos

Distances: Crash Course Astronomy #25

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Distances: Crash Course Astronomy #25

How do astronomers make sense 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. Once the Earth/Sun distance was found, parallax was used to find ...

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