17 janv. 150 av. J.-C. - Hipparchus
Description:
Placed scientific rationale to Eratosthenes grid. Established 11 east-west parrallel lines that had the same length of day.
Ajouté au bande de temps:
Date:
17 janv. 150 av. J.-C.
Maintenaint
~ Il y a 2175 ans