Distances-Crash-Course-Astronomy-25

Video Details

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. Once the Eart... More

2015-07-17

Added Jul 17, 2015  

Channel Education

Duration 11:21   |   views 521970


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