Clyde Tombaugh, the astronomer who discovered the planet Pluto, is shown at work in his study at the Lowell Observatory on Observatory Hill in Flagstaff, Ariz., in 1931. (AP Photo)
Clyde Tombaugh, the astronomer who discovered the planet Pluto, is shown at work in his study at the Lowell Observatory on Observatory Hill in Flagstaff, Ariz., in 1931. (AP Photo) ASSOCIATED PRESS
Clyde Tombaugh, the astronomer who discovered the planet Pluto, is shown at work in his study at the Lowell Observatory on Observatory Hill in Flagstaff, Ariz., in 1931. (AP Photo) ASSOCIATED PRESS

Arizona home of Pluto research dedicates year to icy world, Kansas discoverer

April 12, 2015 01:48 PM