1 janv. 1859 - Pseudo-Planet (1859) Urbain Le Verrier observed the strange orbit of Mercury. He proposed that a planet called "Vulcan" must exist, and would account for the oddities of Mercury's orbit. No such planet would ever be observed, but rather Einstein's theories would later explain the observations.
Ajouté au bande de temps:
Date:
1 janv. 1859
Maintenaint
~ Il y a 166 ans