Columbia Encyclopedia

Search results

500 results found

potassium nitrate

(Encyclopedia)potassium nitrate, chemical compound, KNO3, occurring as colorless, prismatic crystals or as a white powder; it is found pure in nature as the mineral saltpeter, or niter. (The name saltpeter is also ...

Kourou

(Encyclopedia)Kourou, town and commune (2007 pop. 25,918), N French Guiana, on the coast 26 mi (42 km) NW of Cayenne. A rocket-launching base, the Guiana Space Center, is mainly in the commune near the town; the So...

Richard, Maurice

(Encyclopedia)Richard, Maurice (Joseph Henri Maurice Richard) zhōzĕfˈ äNrēˈ môrēsˈ rēˈshärˌ [key], 1921–2000, Canadian hockey player, b. Montreal. Richard, nicknamed “the Rocket” by his admirers,...

White, Robert Michael

(Encyclopedia)White, Robert Michael, 1924–2010, American aviator, b. New York City. A fighter pilot during World War II, he was shot down over Germany and held in a prisoner-of-war camp (Feb.–Apr, 1945); he was...

Churchill, town, Canada

(Encyclopedia)Churchill, town, NE Manitoba, Canada, a remote port on Hudson Bay at the mouth of the Churchill River. The northern terminus of the Hudson Bay Railway, ...

Orbiting Astronomical Observatory

(Encyclopedia)Orbiting Astronomical Observatory (OAO), series of four orbiting observatories (see observatory, orbiting) launched between 1966 and 1972 by the National Aeronautics and Space Administration (NASA) to...

Kiruna

(Encyclopedia)Kiruna kēˈrünä [key], city (1990 pop. 20,470), Norrbotten co., N Sweden. The northernmost city in Sweden, it is the center of the Lapland iron-mining region. The ore is shipped on the Lapland rail...

Strategic Defense Initiative

(Encyclopedia)Strategic Defense Initiative (SDI), former U.S. government program responsible for research and development of a space-based system to defend the nation from attack by strategic ballistic missiles (se...

oceanography

(Encyclopedia)oceanography, study of the seas and oceans. The major divisions of oceanography include the geological study of the ocean floor (see plate tectonics) and features; physical oceanography, which is conc...

firing

(Encyclopedia)firing, process of treating clay or other plastic ceramic materials with heat to produce a hard, durable but brittle material such as pottery. Primitive potters baked their clay in an open fire, but f...