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Hypsicles of Alexandria

(Encyclopedia)Hypsicles of Alexandria hĭpˈsĭklēz [key], astronomer of ancient Greece. Some authorities place Hypsicles in the 2d cent. b.c. and some in the 2d cent. a.d. The 14th and 15th books of Euclid's Elem...

Sigüenza y Góngora, Carlos de

(Encyclopedia)Sigüenza y Góngora, Carlos de kärˈlōs ᵺā sēgwānˈsä ē gōngˈgōrä [key], 1645–1700, Mexican writer and humanist. The foremost intellectual figure of colonial Mexico, he wrote on mathem...

altitude

(Encyclopedia)altitude, vertical distance of an object above some datum plane, such as mean sea level or a reference point on the earth's surface. It is usually measured by the reduction in atmospheric pressure wit...

black hole

(Encyclopedia)black hole, in astronomy, celestial object of such extremely intense gravity that it attracts everything near it and in some instances prevents everything, including light, from escaping. The term was...

Farnsworth, Philo Taylor

(Encyclopedia)Farnsworth, Philo Taylor, 1906–71, American inventor, b. Beaver, Utah, grad. Brigham Young Univ., 1925. He demonstrated (1927) a working model of a television system. His “dissector tube” (calle...

Sutton

(Encyclopedia)Sutton, outer borough (1991 pop. 164,300) of Greater London, SE England. It is mainly residential, but plastics, chemicals, radio components, and paper goods are produced. The areas of Sutton were men...

Maazel, Lorin Varencove

(Encyclopedia)Maazel, Lorin Varencove, 1930–2014, American conductor, b. Neuilly-sur-Seine, France. A musical prodigy, he spent his childhood in Los Angeles, where he made his conducting debut at nine and his vio...

Marconi, Guglielmo, Marchese

(Encyclopedia)Marconi, Guglielmo, Marchese go͞olyĕlˈmō märkāˈzā märkôˈnē [key], 1874–1937, Italian physicist, celebrated for his development of wireless telegraphy (see radio). In the field of electro...

Friendly, Fred W.

(Encyclopedia)Friendly, Fred W., 1915–98, American broadcaster and author, b. New York City as Ferdinand Friendly Wachenheimer. He began his career at age 22 at a radio station in Providence where he wrote, produ...

Thomas, John Charles

(Encyclopedia)Thomas, John Charles, 1891–1960, American baritone, b. Meyersdale, Pa., studied at the Peabody Conservatory, Baltimore. After a successful career in musical comedy he made his operatic debut in Wash...