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supernova
supernova a massive star in the latter stages of stellar evolution that suddenly contracts and then explodes, increasing its energy output as much as a billionfold. Supernovas are the principal distributors of heavy elements throughout the universe; all elements heavier than iron are produced in... Read more |
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Crab Nebula
Crab Nebula diffuse gaseous nebula in the constellation Taurus; cataloged as NGC 1952 and M1, the first object recorded in Charles Messier's catalog of nonstellar objects. It is the remnant of a supernova that was observed in 1054 by Chinese and Arab astronomers to be as bright as Venus;... Read more |
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Fritz Zwicky
Fritz Zwicky , 1898-1974, Swiss-American astrophysicist, b. Bulgaria, educated at Zürich. Associated with the California Institute of Technology after his arrival in the United States in 1925, he became professor of astrophysics in 1942 and emeritus professor in 1972. He discovered more than... Read more |
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Magellanic Clouds
Magellanic Clouds , two dwarf galaxies located in the far southern sky and visible to the unaided eye; they are classified as irregular because they show no definite symmetry or nucleus. The larger of the two, known as the Large Magellanic Cloud (LMC), is located mostly in the constellation Dorado;... Read more |
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neutrino astronomy
neutrino astronomy study of stars by means of their emission of neutrinos , fundamental particles that result from nuclear reactions and are emitted by stars along with light. Approximately 100 billion neutrinos have raced through your body since you began reading this article. The light received... Read more |
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Cassiopeia
Cassiopeia in astronomy, prominent northern constellation located almost directly opposite the Big Dipper across the north celestial pole. Five bright stars in the constellation form a rough W (or M ) in the sky. Some see in this formation the shape of a chair known as Cassiopeia's Chair.... Read more |
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Tycho Brahe
Tycho Brahe , 1546-1601, Danish astronomer. The most prominent astronomer of the late 16th cent., he paved the way for future discoveries by improving instruments and by his precision in fixing the positions of planets and stars. From Brahe's exact observations of the planets, Kepler devised his... Read more |
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dark energy
dark energy repulsive force that opposes the self-attraction of matter (see gravitation ) and causes the expansion of the universe to accelerate. The search for dark energy was triggered by the discovery (1998) in images from the Hubble Space Telescope of a distant supernova that implied an... Read more |
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International Ultraviolet Explorer
International Ultraviolet Explorer Developed during the 1970s, the International Ultraviolet Explorer (IUE) was a joint project between the National Aeronautics and Space Administration (NASA); Particle Physics and Astronomy Research Council (PPARC), formerly known as the Science and Engineering... Read more |
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red giant
red giant star that is relatively cool but very luminous because of its great size. All normal stars are expected to pass eventually through a red-giant phase as a consequence of stellar evolution . As a star uses up its hydrogen by converting it to helium, its central core contracts while the... Read more |
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UW SCIENTISTS ON THE GREAT NEUTRINO HUNT.(Front)
...everything from how stars are formed to...black holes. Neutrinos are high-energy...blasted away from supernovas, quasars...them to detect neutrinos, trace them...Antarctic Muon and Neutrino Detector Array...created when ... |
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THIS YEAR'S TOP DISCOVERY; There goes the UNIVERSE 1998's top scientific...
...of exploding stars called supernovae in very distant...groups found the supernovae were 10 to 15...understanding about how messages of sight, taste...nervous system. - Neutrino mass: An experiment...the elusive subatomic ... |