Announcement of Planet Vulcan

Date: January 2, 1860 • Location: Paris, France

French mathematician Urbain Le Verrier (pictured) announced the putative discovery of the planet Vulcan at a meeting at the French Academy of Sciences in Paris.

Urbain Jean Joseph Le Verrier was a French astronomer and mathematician who specialized in celestial mechanics and is best known for predicting the existence and position of Neptune using only mathematics.