Claudius Ptolemaeus

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Claudius "Ptolemy" Ptolemaeus was an Icons-flag-eg.png Egyptian-born but Icons-flag-gr.png Greco-Roman astronomer, one of the notable historical astronomers.

Solar System concept

Ptolemy proposed to Solar System's structure to have Earth at the center, with the following astronomical bodies orbiting it in terms of increasing distance:

Moon, Mercury, Venus, Sun, Mars, Jupiter, Saturn, Sirius, Stars.

His concept was later corrected by Nicolaus Copernicus, a Icons-flag-pl.png Polish mathematician, who suggested that the Earth was a planet and the Sun was at the center of our Solar System.