| | Timeline related to Greek Astronomy |
 | | About 440 BC Leucippus of Miletus (Λεύκιππος ο Μιλήσιος) said that the world consisted in the void and atoms, which are imperceptible individual particles that differ only in size, shape, and position. |
 | | About 330 BC Heraclides of Pontus (Ηρακλείδης ο Ποντικός) said that the earth turns daily on its axis "while the heavenly things were at rest..., considered the cosmos to be infinite..., [and] with the Pythagoreans, considered each planet to be a world with an earth-like body and with an atmosphere" (Dreyer 1906:123-125). |
 | | About 310-260 BC Aristarchus of Samos (Αρίσταρχος ο Σάμιος) (310-230) BC, in On the Sizes and Distances of the Sun and Moon, used trigonometry to estimate the size of the Moon and its distance by the Earth's shadow during a lunar eclipse. |
| www.mlahanas.de /Greeks/TLAstronomy.htm (2676 words) |