Pluto discovered - Feb. 18, 1930
This Day in History Class - En podcast av iHeartPodcasts and HowStuffWorks
Kategorier:
On this day in 1930, junior astronomer Clyde Tombaugh discovered that Pluto was a planet. Learn even more about Pluto on the episode of Stuff You Missed in History Class, Pluto: The Demoted Dwarf Planet.
