pluto

85 years ago, American astronomer Clyde Tombaugh discovered Pluto: a distant, frozen, tiny rocky planet that quickly became the 9th planet of our solar system. It held this position for 76 years until it was demoted to "Dwarf Planet" (or "Plutoid") in 2006.

On this day 83 years ago, American astronomer Percival Lowell discovered Pluto. The distant, frozen, tiny rocky planet quickly became the 9th planet of our solar system. It held this position for 76 years until it was demoted to "Dwarf Planet" in 2006. But I still consider Pluto the 9th planet of our solar system.