Heraclides Ponticus

Heraclides Ponticus (c. 390-c. 310 BCE) was a Greek philosopher and astronomer of the Academy at Athens, originally from Heraclea on the Black Sea. He is remembered especially for proposing that the Earth rotates on its own axis, an important early astronomical idea, and he wrote widely on philosophy, literature, and natural science in dialogue form. His many works survive only in fragments.