Eratisthenes 276 BC - 194 BC (23 mar 194 año – 23 mar 276 año)
Descripción:
They Calculated The Circumference of the earth and distance to the moon as well as the sun, the tilt of the earth axis and they also compiled a star catalog of 675 stars around us.
They also invented longitude and latitude
(https://en.wikipedia.org/wiki/Eratosthenes)
Añadido al timeline:
fecha:
23 mar 194 año
23 mar 276 año
~ 82 years