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harmony

(Encyclopedia)harmony, in music, simultaneous sounding of two or more tones and, especially, the study of chords and their relations. Harmony was the last in the development of what may be considered the basic elem...

Maxwell, James Clerk

(Encyclopedia)Maxwell, James Clerk klärk [key], 1831–79, great Scottish physicist. After a brilliant career at Edinburgh and Cambridge, where he won early recognition with mathematical papers, he was a professor...

Fermat, Pierre de

(Encyclopedia)Fermat, Pierre de pyĕr də fĕrmäˈ [key], 1601–65, French mathematician. A magistrate whose avocation was mathematics, Fermat is known as a founder of modern number theory and probability theory....

celestial mechanics

(Encyclopedia)celestial mechanics, the study of the motions of astronomical bodies as they move under the influence of their mutual gravitation. Celestial mechanics analyzes the orbital motions of planets, dwarf pl...

Kepler's laws

(Encyclopedia)CE5 Schematic representation of Kepler's second law: The areas ABF and A′B′F′ are equal and are swept out in equal intervals of time by a planet orbiting around the sun (at F). Kepler's laws...

Atlanta campaign

(Encyclopedia)Atlanta campaign, May–Sept., 1864, of the U.S. Civil War. In the spring of 1864, Gen. W. T. Sherman concentrated the Union armies of G. H. Thomas, J. B. McPherson, and J. M. Schofield around Chattan...

Fluxus

(Encyclopedia) Fluxus , an international art movement of the late 1950s-‘60s that emphasized process over finished product and interdisciplinary work. Lithuanian-bo...

Harrison, Lou Silver

(Encyclopedia)Harrison, Lou Silver, 1917–2003, American composer, b. Portland, Oreg. He studied composition in California with Henry Cowell and Arnold Schoenberg. His early work stresses percussion while combinin...

Gilgamesh

(Encyclopedia)Gilgamesh gĭlˈgəmĕsh [key], in Babylonian legend, king of Uruk. He is the hero of the Gilgamesh epic, written on 12 tablets c.2000 b.c. and discovered among the ruins at Nineveh. The epic was lost...