Heraclides of Pontus

(c. 390—322 bc)

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Academy of Athens

Cicero (106 bc — 143 ad) Roman statesman, orator, and writer


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(388–315 bc)

Greek philosopher and astronomer, born in modern Turkey. He made the earliest known suggestion that the apparent rotation of the sky is caused by the axial rotation of the Earth. Often attributed to him is the idea that Venus (and, by implication, Mercury) revolves around the Sun, although there is no firm evidence for this idea appearing in ancient Greece until over a century after his death.

Subjects: Astronomy and Astrophysics.

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