This lot is closed for bidding. Bidding ended on 11/21/2025
Astronomer Clyde Tombaugh signed photo of Pluto, the planet he discovered in 1930. Tombaugh writes along the top margin in black felt-tip, ''Discoverer of the 9th planet, Pluto / Clyde W. Tombaugh / Feb. 18, 1930''. Half-matte photo measures 10'' x 8''. Near fine condition.