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elephant bird
(Encyclopedia) elephant bird, extinct, flightless bird of the family Aepyornithidae. Once native to the island of Madagascar, these gigantic birds may have survived until as late as 1649. Today, they…Weiss, Rainer
(Encyclopedia) Weiss, Rainer, 1932–, American physicist, b. Berlin, Germany, Ph.D. Massachusetts Institute of Technology, 1962. Weiss has been on the faculty of the Massachusetts Institute of…Orbiting Solar Observatory
(Encyclopedia) Orbiting Solar Observatory (OSO), series of eight orbiting observatories (see observatory, orbiting) launched between 1962 and 1971 by the National Aeronautics and Space Administration…Royal Greenwich Observatory
(Encyclopedia) Royal Greenwich Observatory, astronomical observatory established in 1675 by Charles II of England at Greenwich and known as the Royal Observatory. It moved during 1948–57 to…Ginzburg, Vitaly Lazarevich
(Encyclopedia) Ginzburg, Vitaly Lazarevich, 1916–2009, Russian physicist, Ph.D. Moscow State Univ., 1938. He was a researcher at Lebedev Physics Institute of the USSR (later Russian) Academy of…Moerner, W. E.
(Encyclopedia) Moerner, W. E. (William Esco Moerner), 1953–, American physical chemist, b. Pleasanton, Calif., Ph.D. Cornell, 1982. Moerner worked at the IBM Almaden Research Center from 1981 to 1995…astronomical coordinate systems
(Encyclopedia) astronomical coordinate systems. A coordinate system is a method of indicating positions. Each coordinate is a quantity measured from some starting point along some line or curve,…depreciation
(Encyclopedia) depreciation, in accounting, reduction in the value of fixed or capital assets, as by use, damage, weathering, or obsolescence. It can be estimated according to a number of methods. In…sphere
(Encyclopedia) sphere, in geometry, the three-dimensional analogue of a circle. The term is applied to the spherical surface, every point of which is the same distance (the radius) from a certain…Mariana Trench
(Encyclopedia) Mariana Trench or Marianas Trench,Marianas Trench,mârˌēănˈəz [key], elongated depression on the Pacific Ocean floor, 210 mi (338 km) SW of Guam. It is the deepest known depression on…Trending
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