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Meudon

(Encyclopedia)Meudon mödôNˈ [key], town (1990 pop. 46,173), Hauts-de-Seine dept., N central France, a suburb SW of Paris. Metal products, automobile bodies, and explosives are the chief manufactures. The astroph...

Loomis, Elias

(Encyclopedia)Loomis, Elias, 1811–89, American physicist and mathematician, b. Willington, Conn., grad. Yale, 1830. He taught at Western Reserve (1837–44), at New York Univ. (1844–47, 1849–60), and at Yale ...

Bradley, James

(Encyclopedia)Bradley, James, 1693–1762, English astronomer. His discovery of the aberration of light, announced in 1728, provided an important line of evidence for the motion of the earth around the sun. In 1742...

prime meridian

(Encyclopedia)prime meridian, meridian that is designated zero degree (0°) longitude, from which all other longitudes are measured. By international convention, it passes through the site of the Royal Observatory ...

Marshall, Thomas Riley

(Encyclopedia)Marshall, Thomas Riley, 1854–1925, U.S. Vice President (1913–21), b. North Manchester, Ind. A lawyer in Columbia City, Ind., he was Democratic governor of the state (1909–13) and sponsored much ...

Florence, cities, United States

(Encyclopedia)Florence. 1 City (2020 pop. 40,184), seat of Lauderdale co., NW Ala., on the Tennessee River near Muscle Shoals and adjacent to Wilson ...

sociobiology

(Encyclopedia)sociobiology, controversial field that studies how natural selection, previously used only to explain the evolution of physical characteristics, shapes behavior in animals and humans. The theory has c...

Meredith, Edwin Thomas

(Encyclopedia)Meredith, Edwin Thomas, 1876–1928, American publisher and U.S. secretary of agriculture (1920–21), b. Avoca, Iowa. After 1896 he owned and edited the Farmers' Tribune, founded (1902) Successful Fa...

gamma-ray astronomy

(Encyclopedia)gamma-ray astronomy, study of astronomical objects by analysis of the most energetic electromagnetic radiation they emit. Gamma rays are shorter in wavelength and hence more energetic than X rays (see...

Dunbar, William, American scientist

(Encyclopedia)Dunbar, William, 1749–1810, American scientist in the old Southwest, b. near Elgin, Scotland. He came to America in 1771. Commissioned by President Jefferson to investigate the Ouachita and Red Rive...