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infrared astronomy

(Encyclopedia)infrared astronomy, study of celestial objects by means of the infrared radiation they emit, in the wavelength range from about 1 micrometer to about 1 millimeter. All objects, from trees and building...

weather satellite

(Encyclopedia)weather satellite, artificial satellite used to gather data on a global basis for improvement of weather forecasting. Information includes cloud cover, storm location, temperature, and heat balance in...

Stephen, Saint, duke and king of Hungary

(Encyclopedia)Stephen, Saint, or Stephen I, 975–1038, duke (997–1001) and first king (1001–38) of Hungary, called the Apostle of Hungary. The Hungarian state may be said to date from his reign. Because he con...

National Education Association

(Encyclopedia)National Education Association (NEA), organization of professional educators in the United States, with almost 2.5 million members. The NEA was founded (1850) as the National Teachers Association, cha...

National Security Agency

(Encyclopedia)National Security Agency (NSA), an independent agency within the U.S. Dept. of Defense. Founded by presidential order in 1952, its primary functions are to collect and analyze communications intellige...

Kruger National Park

(Encyclopedia)Kruger National Park, game reserve, c.8,000 sq mi (20,720 sq km), Limpopo and Mpumalanga, NE South Africa. One of the world's largest wildlife sanctuaries, it has almost every species of game found in...

Tsavo National Park

(Encyclopedia)Tsavo National Park tsäˈvō [key], 8,034 sq mi (20,808 sq km), SE Kenya; est. 1948. Located on the semiarid plains, it is a sanctuary for the large animals of E Africa. The Mzima Springs are found t...

Forillon National Park

(Encyclopedia)Forillon National Park fôˌrēyōNˈ [key], 92 sq mi (238 sq km), at the tip of Forillon Peninsula, SE Que., Canada, near Gaspé; est. 1970. On the Gulf of St. Lawrence, the park has a scenic coastal...

National Petroleum Reserve

(Encyclopedia)National Petroleum Reserve, area, c.23 million acres (9.32 million hectares), Alaska North Slope, situated W of Prudhoe Bay and the Arctic National Wildlife Refuge. The reserve, which is the largest r...

Kafue National Park

(Encyclopedia)Kafue National Park, c.8,650 sq mi (22,400 sq km), S central Zambia, S Africa; est. 1950. It is a haven for the animal and bird life of a diverse region that includes grasslands, forests, and marshes....