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Claudius Ptolemy was an influential astronomer and geographer who lived from 90 CE to 168 CE in Alexandria, Egypt. He made many astronomical observations and developed theories about the solar system that were published in his influential 12-volume work "The Almagest", including his belief that the Earth was stationary at the center of the universe with the Sun, planets and stars orbiting around it. His models incorporating eccentrics, epicycles and an equant to explain planetary retrograde motion were acce

Author

Sahira Bungcasan Heuser

Language

EN