Astronomy
Aristarchus [b. Samos, c. 310 bce, d. Alexandria, c. 230 bce] makes first rough calculation of the distance and size of the Moon and proposes that Earth and the planets revolve about the Sun. See also 350 bce Astronomy.
| Millennium: | 1st millennium BC |
| Centuries: | 4th century BC – 3rd century BC – 2nd century BC |
| Decades: | 300s BC 290s BC 280s BC – 270s BC – 260s BC 250s BC 240s BC |
| Years: | 279 BC 278 BC 277 BC 276 BC 275 BC 274 BC 273 BC 272 BC 271 BC 270 BC |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
Contents: 279 BC 278 BC 277 BC 276 BC 275 BC 274 BC 273 BC 272 BC 271 BC 270 BC
| Wikimedia Commons has media related to: 270s BC |
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