13 avr. 1473 - Copernicus Nicholas Copernicus studied the planets. He believed that planets including earth orbited around the sun. He didn't have a lot of evidence to prove this he just had a lot to prove that Ptolemy's geocentric system was wrong. He wrote a book on his heliocentric system.
Ajouté au bande de temps:
Date:
13 avr. 1473
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~ Il y a 552 ans