None. Clyde Tombaugh discovered the body we know as Pluto. This was originally described as a planet but internationally it is now recognized that Pluto is not a planet but a dwarf planet. Therefore Clyde Tombaugh did not actually discover a planet!
Clyde Tombaugh discovered Pluto at the Lowell Observatory in Flagstaff, Arizona.
Pluto was discovered by Clyde Tombaugh in 1930 at the Lowell Observatory in Arizona. Tombaugh discovered Pluto by systematically searching for unknown objects in the outer solar system using photographic plates.
Pluto was discovered on February 18, 1930 by Clyde Tombaugh at Lowell Observatory in Flagstaff, Arizona. It was discovered using two photographic plates taken of the same place in the sky on January 23 and 29.
Clyde W. Tombaugh discovered it on February 18, 1930.
Never. Pluto was discovered by Clyde Tombaugh, in 1930.
Clyde Tombaugh discovered Pluto in 1930.
Clyde William Tombaugh was the American astronomer that discovered Pluto!
Clyde Tombaugh discovered Pluto at the Lowell Observatory in Flagstaff, Arizona.
1930 discovered by Clyde Tombaugh
Pluto was discovered in 1930 by Clyde Tombaugh.
Pluto was discovered by Clyde Tombaugh in 1930 at the Lowell Observatory in Arizona. Tombaugh discovered Pluto by systematically searching for unknown objects in the outer solar system using photographic plates.
Pluto was discovered on February 18, 1930 by Clyde Tombaugh at Lowell Observatory in Flagstaff, Arizona. It was discovered using two photographic plates taken of the same place in the sky on January 23 and 29.
Clyde W. Tombaugh discovered it on February 18, 1930.
Clyde W. Tombaugh discovered Pluto on the 18th of Febuary 1930.
Only three planets have real discovery times. Pluto which is now a dwarf planet was found bye Clyde tombaugh uranus was discovered by sir William herschel neptune was discovered by john couch Adams
Clyde Tombaugh was born on February 4, 1906.
Pluto was discovered by Clyde Tombaugh on February 18, 1930.