Callippus biography

Biography

The dates given for the birth and death of Callippus of Cyzicus are guesses but he is known to have been working with Aristotle in Athens starting in 330 BC.

We know that Callippus was a student in the School of Eudoxus.

Callippus biography

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Callippus biography documentary

Eudoxus' model

Callippus biography book

We also know that he made his astronomical observations on the shores of the Hellespont, which can be deduced from the observations themselves. Simplicius writes in his commentary on De caelo by Aristotle(see for example [1]):-

Callippus of Cyzicus, having studied with Polemarchus, Eudoxus's pupil, following him to Athens dwelt with Aristotle, correcting and completing, with Aristotle's help, the discoveries of Eudoxus.

Callippus made accurate determinations of the lengths of the seasons and constructed a 76 year cycle comprising 940 months to harmonise the solar and lunar years which was adopted in 330 BC and used by all later astronomers.

This calendar of Callippus is examined in detail by van der Waerden in [6]. Ptolemy g