CATEGORIES
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Discovered 9th Planet Pluto
TOMBAUGH, Clyde W. (1906-1997). Astronomer, author. Discovered the ninth planet Pluto at Lowell Observatory, Flagstaff, Arizona in February 1930. He holds the distinction of being the only person in the 20th century to have discovered a planet. Reproduction of a photograph, on photography paper of the astronomer which appears he is entering the observatory holding what looks to be photographic plates. Signed in full and adding “1931” by his hand. In excellent condition..................$275.00
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