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cesium
(Encyclopedia)cesium sēˈzēəm [key] [Lat.,=bluish gray], a metallic chemical element; symbol Cs; at. no. 55; at. wt. 132.90545; m.p. 28.4℃; b.p. 669.3℃; sp. gr. 1.873 at 20℃; valence +1. Cesium is a ductil...European Southern Observatory
(Encyclopedia)European Southern Observatory (ESO), an intergovernmental organization for astronomical research with headquarters in Garching, near Munich, Germany. The ESO began in 1962 as a consortium among Belgiu...part of speech
(Encyclopedia)part of speech, in traditional English grammar, any one of about eight major classes of words, based on the parts of speech of ancient Greek and Latin. The parts of speech are noun, verb, adjective, a...Ptolemaic system
(Encyclopedia)Ptolemaic system tŏlˌəmāˈĭk [key], historically the most influential of the geocentric cosmological theories, i.e., theories that placed the earth motionless at the center of the universe with a...In
(Encyclopedia)In, symbol for the element indium. ...Anaximander
(Encyclopedia)Anaximander ənăkˌsĭmănˈdər [key], c.611–c.547 b.c., Greek philosopher, b. Miletus; pupil of Thales. He made the first attempt to offer a detailed explanation of all aspects of nature. Anaxima...Ssu-ma Ch'ien
(Encyclopedia)Ssu-ma Ch'ien so͝oˈmä chyĕn [key], 145?–90? b.c., Chinese historian; sometimes called the Father of Chinese History. He succeeded his father, Ssu-ma T'an, as grand historian (an office then deal...science
(Encyclopedia)science [Lat. scientia=knowledge]. For many the term science refers to the organized body of knowledge concerning the physical world, both animate and inanimate, but a proper definition would also hav...Sedna
(Encyclopedia)Sedna, in astronomy, the most distant known large object in the solar system. With a highly eccentric elliptical orbit that ranges from an estimated 76 AU to 937 AU, Sedna also has an extremely long o...Mimas
(Encyclopedia)Mimas mīˈmăs [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn I (or S1), Mimas is 244 mi (392 km) in diameter, orbits Saturn at a mean distance of...Browse by Subject
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