The original blink comparator used by Clyde Tombaugh to discover the Planet Pluto in 1930

May 2005 | By John Kocur
The original blink comparator used by Clyde Tombaugh to discover the Planet Pluto in 1930 The original blink comparator used by Clyde Tombaugh to discover the Planet Pluto in 1930, now on display in the Rotonda

See Also

Lowell Observatory/Arizona Trip 2005