Details:

Clyde W. Tombaugh autographed 5 x 3-inch card, signed boldly in black ink above a handwritten inscription reading, "Discovered 9th planet, Pluto, on February 1930 at 24 years of age."

Fine condition.

Clyde W. Tombaugh (1906-1997) was an American astronomer best known for discovering Pluto in 1930 while working at Lowell Observatory in Arizona. His discovery made him one of the most celebrated astronomers of the 20th century, and he later continued research in planetary astronomy and the search for additional objects in the outer solar system.

Authentication:
Includes a full letter of authenticity from JG Autographs, Inc.

Premium:
A 25% Buyers Premium Will Be Added to All Winning Bids

Reference sku: 11667 1418514-1