On February 18, 1930 astronomer Clyde Tombaugh discovered this.
- Pluto
- The Andromeda Galaxy
- Vesta
- Comet Tombaugh
Daily Quiz for October 6, 2017
On February 18, 1930 astronomer Clyde Tombaugh discovered this.
On February 18, 1930 astronomer Clyde Tombaugh discovered this.
Pluto. Using a new technique of photographic plates and a blink microscope, Tombaugh found the tiny planet that had been theorized by Percival Lowell because of wobbles in the orbit of Uranus.