It was discovered on Feb. 18, 1930, by self-taught astronomer Clyde Tombaugh at the Lowell Observatory in Flagstaff, Arizona, some 250 miles from Las Vegas.
It was discovered on Feb. 18, 1930, by self-taught astronomer Clyde Tombaugh at the Lowell Observatory in Flagstaff, Arizona, some 250 miles from Las Vegas.