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Cygnus
Book article from: The Columbia Encyclopedia, Sixth Edition
Cygnus [Lat.,=the swan], northern constellation located SE of Draco and NW...cross, forming a large triangle with Vega in Lyra and Altair in Aquila. Cygnus reaches its highest point in the evening sky in September.
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Milky Way
Book article from: The Columbia Encyclopedia, Sixth Edition
...the Southern Cross), Sagittarius (where it is brightest), Scorpius, Aquila, Cygnus, Perseus, Cassiopeia, Auriga, and Gemini. In the direction of Cygnus is the Great Rift, a band of dark matter that lies along the Milky Way, dividing...
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Swans
Encyclopedia entry from: The Gale Encyclopedia of Science
...except Antarctica. Three species of swan, the mute swan (Cygnus olor), the tundra swan (C. colombianus), and the trumpeter...whistling swan, closely related to the Bewick ’ s swan (Cygnus columbianus bewickii) of Eurasia. The tundra swan breeds widely...
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swan
Book article from: The Columbia Encyclopedia, Sixth Edition
...carrying calls. The orange-billed white trumpeter swan, Cygnus buccinator, seen in parks, is the mute swan, of Old World...atrata, is native to Australia, and the black-necked swan, Cygnus melancoriphus, to South America. The black swan has been domesticated...
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Black Hole
Encyclopedia entry from: UXL Encyclopedia of Science
...is believed to be the companion star in a binary star called Cygnus X-1 (a binary star is a pair of stars in a single system that orbit each other, bound together by their mutual gravities). Cygnus X-1 is emitting intense amounts of X rays, possibly as a...
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constellation
Book article from: The Columbia Encyclopedia, Sixth Edition
...Andromeda, Hercules, Orion), animals (e.g., Leo the Lion, Cygnus the Swan, Draco the Dragon), or objects (e.g., Libra...Ursa Major and Ursa Minor, and the Northern Cross is part of Cygnus. Bright stars within a constellation are designated according...
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black hole
Book article from: The Columbia Encyclopedia, Sixth Edition
...small number of possible black holes have been detected. The first discovered (1971) was Cygnus X-1, an X-ray source in the constellation Cygnus. In 1994 astronomers employing the Hubble Space Telescope announced that they had found conclusive...
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Grote Reber
Encyclopedia entry from: Encyclopedia of World Biography
...constellation Sagittarius, the center of the universe. He also detected strong signals from other constellations, namely Cygnus, Cassiopeia, Canis Major, and Puppis. Reber published his initial findings in the Proceedings of the Institute of Radio...
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X-ray astronomy
Book article from: The Columbia Encyclopedia, Sixth Edition
...discovered a series of X-ray binary stars in which ordinary stars orbit neutron stars that emit X rays. One of these sources, Cygnus X-1, is an object with ten times the mass of the sun. Too massive to be a neutron star , it is possibly a black hole . Much...
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Northern Cross
Book article from: The Columbia Encyclopedia, Sixth Edition
Northern Cross see Cygnus .
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