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comet - 6 dictionary results
com⋅et
[kom-it]
–noun Astronomy.
| a celestial body moving about the sun, usually in a highly eccentric orbit, consisting of a central mass surrounded by an envelope of dust and gas that may form a tail that streams away from the sun. |
Origin:
1150–1200; ME comete < AF, OF < L comētēs, comēta < Gk kom
tēs wearing long hair, equiv. to komē-, var. s. of komân to let one's hair grow (deriv. of kómē hair) + -tēs agent suffix
1150–1200; ME comete < AF, OF < L comētēs, comēta < Gk kom
tēs wearing long hair, equiv. to komē-, var. s. of komân to let one's hair grow (deriv. of kómē hair) + -tēs agent suffix
Related forms:
com⋅et⋅like, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To comet
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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comet
An object that enters the inner solar system, typically in a very elongated orbit around the sun. Material is boiled off from the comet by the heat of the sun, so that a characteristic tail is formed. The path of a comet can be in the form of an ellipse or a hyperbola. If it follows a hyperbolic path, it enters the solar system once and then leaves forever. If its path is an ellipse, it stays in orbit around the sun.
Note: Comets were once believed to be omens, and their appearances in the sky were greatly feared or welcomed.
Note: The most famous comet, Comet Halley (or Halley's comet), passes close to the Earth roughly every seventy-six years, most recently in 1986.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Language Translation for : comet
Spanish:
cometa,
German:
der Komet,
Japanese:
彗星
comet
1154, from O.Fr. comete, from L. cometa, from Gk. (aster) kometes, lit. "long-haired (star)," from kome "hair of the head" (koman "let the hair grow long"), so called from resemblance of the comet's tail to streaming hair.
Online Etymology Dictionary, © 2001 Douglas Harper
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| comet (kŏm'ĭt) Pronunciation Key
A celestial object that orbits the Sun along an elongated path. A comet that is not near the Sun consists only of a nucleus—a solid core of frozen water, frozen gases, and dust. When a comet comes close to the Sun, its nucleus heats up and releases a gaseous coma that surrounds the nucleus. A comet forms a tail when solar heat or wind forces dust or gas off its coma, with the tail always streaming away from the Sun. ◇ Short-period comets have orbital periods of less than 200 years and come from the region known as the Kuiper belt. Long-period comets have periods greater than 200 years and come from the Oort cloud. See more at Kuiper belt, Oort cloud. See Note at solar system. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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| COMET Cooperative Program for Operational Meteorology, Education, and Training (National Center for Atmospheric Research) |
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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