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What did gailieo discover in 1609?

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Anonymous

15y ago
Updated: 8/18/2019

During the summer of 1609, Galileo built a telescope (20x power) and discovered many things about the universe. Some of his discoveries were observing that the surface of the moon was not smooth and seeing more stars than humans of his day ever believed were possible to exist.

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Wiki User

15y ago

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