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jan 1, 1613 - After being so warmly accepted at Rome, Galileo writes three letters to formally take his position on the heliocentric theory of the universe. His main reason for believing Kepler and Copernicus were his observations of sunspots moving around the sun.

Added to timeline:

7 Dec 2017
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Tony Menting
Galileo

Date:

jan 1, 1613
Now
~ 406 years ago
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