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Tombaugh, Clyde William

(Encyclopedia)Tombaugh, Clyde William tŏmˈbô [key], 1906–97, American astronomer, b. Streator, Ill. Although lacking formal training or a college degree, he was hired in 1929 as an assistant by the Lowell Obse...

pluralism

(Encyclopedia)pluralism, in philosophy, theory that considers the universe explicable in terms of many principles or composed of many ultimate substances. It describes no particular system and may be embodied in su...

Slipher, Vesto Melvin

(Encyclopedia)Slipher, Vesto Melvin slīˈfər [key], 1875–1969, American astronomer, b. Mulberry, Ind. From 1901 he was at Lowell Observatory, Flagstaff, Ariz., where he served as director (1917–54). Much of h...

James, Saint (St. James the Greater)

(Encyclopedia)James, Saint, d. c.a.d. 43, in the Bible, one of the Twelve Apostles, called St. James the Greater. He was the son of Zebedee and the brother of St. John; these brothers were the Boanerges, or Sons of...

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