American astronomer (1906–1997) best known for discovering Pluto in 1930. Signed book: Out Of the Darkness: The Planet Pluto. Later printing. Pennsylvania: Stackpole Books, 1980. Hardcover with dustjacket, 6.25 x 9.25, 221 pages. Signed and inscribed on the title page, “To Rev. Father William Ward. I am very glad that you enjoyed the book. With best wishes, Clyde W. Tombaugh. Discovered 9th planet, Pluto, on 18 Feb 1930. 23 Feb 1984.” In fine condition, with some scattered wear and toning to dustjacket. RRAuction COA.
