De magnitudinibus et distantiis solis et lunae
Samos
A
Aristarchus of Samos
Aristarchus of Samos
310 BCE–230 BCE
Aristarchus of Samos was a Greek astronomer and mathematician of the 3rd century BCE. He is celebrated for proposing that the Sun, not the Earth, lies at the center, with the Earth and planets revolving around it, an early heliocentric hypothesis reported by later writers. His one surviving treatise estimates the relative sizes and distances of the Sun and Moon using geometry.