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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...

transmutation of elements

(Encyclopedia)transmutation of elements, conversion of one chemical element into another. The expression has both historical and contemporary significance. The transmutation of certain metals into gold by means of ...

blazonry

(Encyclopedia)blazonry blāˈzənrē [key], science of describing or depicting armorial bearings. The introduction, since the Middle Ages, of artificial rules and fanciful medieval terms has complicated the science...

biology

(Encyclopedia)biology, the science that deals with living things. It is broadly divided into zoology, the study of animal life, and botany, the study of plant life. Subdivisions of each of these sciences include cy...

Roche limit

(Encyclopedia)Roche limit, the closest distance that a celestial body held together only by its own gravity can come to a planet without being pulled apart by the planet's tidal (gravitational) force. This distance...

sextant

(Encyclopedia)CE5 Sextant sextant, instrument for measuring the altitude of the sun or another celestial body; such measurements can then be used to determine the observer's geographical position or for other n...

Debrecen

(Encyclopedia)Debrecen dĕˈbrĕtsĕn [key], city (1991 est. pop. 213,927), E Hungary, the nation's third largest city and the economic and cultural center of the Great Plain (Alföld) region E of the Tisza River. ...

Cleland, Max

(Encyclopedia) Cleland, Max, 1942-2021, American politician, b. Atlanta, GA, as Joseph Maxwell Cleland, Stetson Univ. (B.A., 1964), Emory Univ. (M.A., 1968). Cleland enlisted in the Army in 1965 and served in Vie...

Joplin, Janis

(Encyclopedia)Joplin, Janis jŏpˈlĭn [key], 1943–70, American blues-rock singer, b. Port Arthur, Tex. After dropping out of college (1963) and singing folk rock in Texas clubs, she moved (1966) to San Francisco...

Miller, Henry

(Encyclopedia)Miller, Henry, 1891–1980, American author, b. New York City. Miller sought to reestablish the freedom to live without the conventional restraints of civilization. His books are potpourris of sexual ...