The planet Pluto was discovered by astronomer Clyde Tombaugh on this date in 1930. He used a 13-inch astrograph to photograph and identify the planet. Tombaugh also believed in the possiblily of extraterrestrial activity and claimed to have seen UFOs.
Portrait of William Herschel Astronomer Sir Frederick William Herschel on March 13, 1781 discovered the planet Uranus.He also later in his career discovered infrared radiation while testing telescope filters. His more »