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dimension, in mathematics

(Encyclopedia)dimension, in mathematics, number of parameters or coordinates required locally to describe points in a mathematical object (usually geometric in character). For example, the space we inhabit is three...

Eiffel Tower

(Encyclopedia)Eiffel Tower, structure designed by A. G. Eiffel and erected in the Champ-de-Mars for the Paris exposition of 1889. The tower is 984 ft (300 m) high and consists of an iron framework supported on four...

West Virginia University

(Encyclopedia)West Virginia University, mainly at Morgantown; coeducational; land-grant and state supported; est. and opened 1867 as an agricultural college, renamed 1868. It operates 15 schools and colleges, inclu...

Aldrin, Buzz

(Encyclopedia)Aldrin, Buzz ôlˈdrĭn [key] (Edwin Eugene Aldrin, Jr.), 1930–, American astronaut, b. Montclair, N.J. After graduating from West Point (1951), Aldrin joined the U.S. air force and flew 66 combat m...

Van Allen, James Alfred

(Encyclopedia)Van Allen, James Alfred, 1914–2006, American physicist and space scientist, Mt. Pleasant, Iowa. A graduate (Ph.D 1939) of and professor of physics (1951–85) at what is now the Univ. of Iowa, where...

3D printer

(Encyclopedia)3D printer, computerized device that produces a three-dimensional object by creating it as a series of thin layers. The object is created from a model stored in computer-aided design file; the model i...

Ruscha, Ed

(Encyclopedia)Ruscha, Ed (Edward Joseph Ruscha 4th) ro͞oshāˈ [key], 1937–, American artist, b. Omaha, Neb. He is closely associated with Los Angeles, where he moved to attend (1956–60) the Chouinard Art Inst...

Vandenberg Air Force Base

(Encyclopedia)Vandenberg Air Force Base, U.S. military installation, 3,456 acres (1,399 hectares), SW Calif., near Lompoc; chief Pacific coast launch site for military satellites, and headquarters of the U.S. Space...

Minamitori

(Encyclopedia)Minamitori or Marcus Island, coral atoll, c.740 acres (300 hectares), W Pacific Ocean, 700 mi (1,125 km) SE of Japan; part of Tokyo prefecture, Japan. Triangular in shape and rising to 204 ft (62 m), ...

Lakehurst

(Encyclopedia)Lakehurst, borough (1990 pop. 3,078), Ocean co., E central N.J.; inc. 1921. It is important as the site of Lakehurst Maxfield Field, formerly Lakehurst Naval Air Station (est. 1921). The Shenandoah (1...