Ptolemei (1 Jan 100 Jahr – 1 Jan 170 Jahr)

Beschreibung:

Claudius Ptolemy was an ancient Greek astronomer and mathematician, famous for his theory of geocentricity. In this theory, he proposed a geocentric system in which the Earth is at the center, and all other celestial bodies revolve around it. In addition, Ptolemy made observations of the planets and stars, and the movement of the moon.

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