Historical Events
Dialogue Concerning the Two Chief World Systems
Galileo Galilei's book "Dialogue Concerning the Two Chief World Systems" is published comparing the Copernican and Ptolemaic systems and whether the Earth orbits the sun
1632 Highlights
About February 22, 1632
Day of the Week: Sunday
How Long Ago? 392 years, 2 months and 7 days
Leap Year: Yes
Star Sign: Pisces
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