Theodosius of Bithynia (159–89 BCE)

Born 159 BCE, died 89 BCE.

Theodosius of Bithynia (Ancient Greek: Θεοδόσιος Theodosios; 2nd–1st century BC) was a Hellenistic astronomer and mathematician from Bithynia who wrote the Spherics, a treatise about spherical geometry, as well as several other books on mathematics and astronomy, of which two survive, On Habitations and On Days and Nights.

Text from the Wikipedia article Theodosius_of_Bithynia, licensed CC BY-SA 4.0.

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Theodosius of Bithynia (159–89 BCE)

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