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Donati, Giovanni Battista

(Encyclopedia)Donati, Giovanni Battista jōvänˈnē bät-tēsˈtä dōnäˈtē [key], 1826–73, Italian astronomer, b. Pisa. Serving as director of the Florence Observatory from 1864, he was a pioneer in the spec...

Airy, Sir George Biddell

(Encyclopedia)Airy, Sir George Biddell, 1801–92, English astronomer. The son of a poor farmer, he distinguished himself as Senior Wrangler at Cambridge, where he was elected fellow of Trinity College (1824) and a...

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 ...

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...

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...

Armagh, city, Northern Ireland

(Encyclopedia)Armagh, city, S Northern Ireland. Textiles, chemicals, and processed foods are produced in the city. Armagh (originally Ard Macha) has been the ecclesiastical capital of all Ireland since ...