Callippus

Callippus in Wikipedia

Callippus or Calippus (Greek: Κάλλιπος; ca. 370 BC–ca. 300 BC) was a Greek astronomer and mathematician. Callippus was born at Cyzicus, and studied under Eudoxus of Cnidus at the Academy of Plato. He also worked with Aristotle at the Lyceum, which means that he was active in Athens prior to Aristotle's death in 322. He observed the movements of th...

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