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Fred Lawrence Whipple Observatory
(Encyclopedia)Fred Lawrence Whipple Observatory, astronomical observatory located 35 mi (56 km) S of Tucson, Ariz., at an altitude of 8,500 ft (2,590 m). It is operated jointly by the Smithsonian Astrophysical Obse...Helene
(Encyclopedia)Helene həlēnˈ, hĕlˈənə [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn XII (or S12), Helene is an irregularly shaped (nonspherical) body meas...Nicholas of Cusa
(Encyclopedia)Nicholas of Cusa (Nicolaus Cusanus), 1401?–1464, German humanist, scientist, statesman, and philosopher, from 1448 cardinal of the Roman Catholic Church. The son of a fisherman, Nicholas was educate...bull, papal letter
(Encyclopedia)bull [Lat. bulla=leaden seal], papal letter. As the diplomatic organization of the papal chancery progressed in the Middle Ages, the papal bull came to be more solemn than the papal brief or encyclica...elongation
(Encyclopedia)elongation, in astronomy, the angular distance between two points in the sky as measured from a third point. The elongation of a planet is usually measured as the angular distance from the sun to the ...Stiles, Ezra
(Encyclopedia)Stiles, Ezra, 1727–95, American theologian and educator, b. North Haven, Conn., grad. Yale, 1746. He studied theology, was ordained in 1749, and tutored (1749–55) at Yale. Resigning from the minis...liberal arts
(Encyclopedia)liberal arts, term originally used to designate the arts or studies suited to freemen. It was applied in the Middle Ages to seven branches of learning, the trivium of grammar, logic, and rhetoric, and...Orbiting Solar Observatory
(Encyclopedia)Orbiting Solar Observatory (OSO), series of eight orbiting observatories (see observatory, orbiting) launched between 1962 and 1971 by the National Aeronautics and Space Administration (NASA) to study...Payne-Gaposchkin, Cecilia
(Encyclopedia)Payne-Gaposchkin, Cecilia, 1900–1979, British-American astronomer, b. Wendover, England, as Cecilia Helena Payne. She studied at Cambridge and at the Harvard College Observatory, and in her doctoral...Duhem, Pierre Maurice Marie
(Encyclopedia)Duhem, Pierre Maurice Marie pyĕr mōrēsˈ märēˈ düĕmˈ [key], 1861–1916, French physicist and philosopher and historian of science. After studying at the École Normale Supérieure he taught ...Browse by Subject
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