AST 113: Modern Astronomy
Friday, September 25, 2015
Motion, Gravity, and Einstein
http://youtu.be/-xr6-m1Fy-s?hd=1
1 comment:
Keiairrah Williamson
September 29, 2015 at 5:50 PM
What did the first practical telescope actually do?
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What did the first practical telescope actually do?
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