1930 AD
Pluto is discovered
Clyde Tombaugh identifies Pluto using photographs taken at Lowell Observatory.
- Time period
- 1930 AD
- Region
- Americas
- Theme
- Science
- Civilization
- United States
Clyde Tombaugh identified Pluto on photographic plates on 18 February 1930. Initially classified as a planet, it was reclassified as a dwarf planet in 2006.