1 févr. 150 - Ptolemy
Description:
Ptolemy, who was a mathematician, astronomer, geographer, astrologer, and poet, wrote his book called "Almagest". In his book, he introduced so called epicycles to explain planetary motions, based on the assumption that the earth is at the center of the solar system.Ajouté au bande de temps:
Date:
1 févr. 150
Maintenaint
~ Il y a 1875 ans
