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Kuiper, Gerard Peter

(Encyclopedia)Kuiper, Gerard Peter or Gerrit Pieter gĕrˈĭt pēˈtər kīˈpər [key], 1905–73, American astronomer, b. the Netherlands. Kuiper is considered to be the father of modern planetary science for his...

ultraviolet astronomy

(Encyclopedia)ultraviolet astronomy, study of celestial objects by means of the ultraviolet radiation they emit, in the wavelength range from about 90 to about 350 nanometers. Ultraviolet (UV) line spectrum measure...

Ganymede, in astronomy

(Encyclopedia)Ganymede gănˈēmēdˌ [key], in astronomy, one of the moons, or natural satellites, of Jupiter; the largest natural satellite in the solar system, it is larger than the planet Mercury. ...

Sugar Land

(Encyclopedia)Sugar Land, city (2000 pop. 63,328), Fort Bend co., SE Texas, on the Brazos River and Oyster Creek, a W suburb of Houston; inc. 1959. The city, which now has a diversified economy, began as a pre–Ci...

Battle of the Bulge

(Encyclopedia)Battle of the Bulge, popular name in World War II for the German counterattack in the Ardennes, Dec., 1944–Jan., 1945. More than a million men fought in what is also known as the Battle of the Ard...

San Lorenzo

(Encyclopedia)San Lorenzo, town, S Honduras, on the Gulf of Fonseca. Its satellite, Henecán is the chief Pacific port of Honduras. Henecán's modern port facilities and deepwater harbor and channel approach were c...

Herndon

(Encyclopedia)Herndon, town (2020 pop. 24,655), Fairfax co., N Va., inc. 1874, rechartered 1938. A suburb of Washington, D.C., Herndon has a mix of light and high-tec...

Xichang

(Encyclopedia)Xichang shēˈchängˈ [key], city (1994 est. pop. 504,800), SW Sichuan prov., China. A trading and transport center, the city has an economy based on agricultural products and processing; there also ...

Kapuskasing

(Encyclopedia)Kapuskasing kăpəskāˈsĭng [key], town (1991 pop. 10,344), central Ont., Canada, on the Kapuskasing River, N of Timmins. It has lumbering and pulp and paper mills, a cold-weather automotive testing...

Timmins

(Encyclopedia)Timmins, town (1991 pop. 47,461), central Ont., Canada, on the Mattagami River. Timmins is the commercial center of the rich Porcupine gold-mining district, where gold was first discovered in 1909. Si...