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Strategic Air Command
(Encyclopedia)Strategic Air Command (SAC), former command of the U.S. air force (see Air Force, United States Department of the) charged with organizing, training, equipping, administering, and preparing strategic ...European Astronaut Center
(Encyclopedia)European Astronaut Center (EAC): see European Space Agency. ...European Launcher Development Organization
(Encyclopedia)European Launcher Development Organization (ELDO): see European Space Agency. ...pump
(Encyclopedia)pump, device to lift, transfer, or increase the pressure of a fluid (gas or liquid) or to create a vacuum in an enclosed space by the removal of a gas (see vacuum pumps under vacuum). The centrifugal ...Ultima Thule
(Encyclopedia)Ultima Thule, in astronomy and space exploration, nickname for Arrokoth. ...Mather, John Cromwell
(Encyclopedia)Mather, John Cromwell, 1946–, American astrophysicist, b. Roanoke, Va., Ph.D. Univ. of California, Berkeley, 1974. He has been a researcher at NASA's Goddard Space Flight Center in Greenbelt, Md., s...chancel
(Encyclopedia)chancel, primarily that part of the church close to the altar and used by the officiating clergy. In the early churches it was separated from the nave by a low parapet or open railing (cancellus), its...Shepard, Alan Bartlett, Jr.
(Encyclopedia)Shepard, Alan Bartlett, Jr., 1923–98, American astronaut, b. East Derry, N.H., grad. Annapolis, 1944. He served on a destroyer during World War II and later had extensive experience as a test pilot....League City
(Encyclopedia)League City, city (1990 pop. 30,159), Galveston co., SE Tex.; inc. 1961. The aeronautics industry is of prime importance; NASA's Lyndon B. Johnson Space Center is nearby. There is also diversified lig...ether, in physics and astronomy
(Encyclopedia)ether or aether, in physics and astronomy, a hypothetical medium for transmitting light and heat (radiation), filling all unoccupied space; it is also called luminiferous ether. In Newtonian physics a...Browse by Subject
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