meteoroid

meteoroid

meteoroid A small particle from a comet or asteroid in orbit around the Sun. While the distinction between a large meteoroid and a small asteroid may be somewhat blurred, the term meteoroid most commonly refers to a particle which gives rise to a meteor on entering Earth's atmosphere. Typical meteoroids in a meteor stream, such as that which produces the Perseid meteor shower, are a few millimetres in diameter, and have low densities (0.2–0.3 g/cm3). Meteoroids in the Geminid stream, whose parent body is the asteroid Phaethon, have a higher density, 2 g/cm3.

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"meteoroid." A Dictionary of Astronomy. 1997. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

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"meteoroid." A Dictionary of Astronomy. 1997. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-meteoroid.html

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meteoroid

me·te·or·oid / ˈmētēəˌroid/ • n. Astron. a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere. DERIVATIVES: me·te·o·roid·al / ˌmētēəˈroidl/ adj.

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"meteoroid." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

"meteoroid." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O999-meteoroid.html

"meteoroid." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-meteoroid.html

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meteoroid

meteoroid Small, extraterrestrial body, within the solar system, that may enter the Earth's atmosphere if its orbit around the Sun crosses that of the Earth. Strictly, at the point where a meteoroid enters the atmosphere it is referred to as a meteor; if it reaches the Earth's surface it is known as a meteorite.

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AILSA ALLABY and MICHAEL ALLABY. "meteoroid." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "meteoroid." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-meteoroid.html

AILSA ALLABY and MICHAEL ALLABY. "meteoroid." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-meteoroid.html

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meteoroid

meteoroid see meteor .

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"meteoroid." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

"meteoroid." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1E1-X-meteoroid.html

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meteoroid

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"meteoroid." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

"meteoroid." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O233-meteoroid.html

"meteoroid." Oxford Dictionary of Rhymes. 2007. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-meteoroid.html

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