nucleus of a comet

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• Comet dust — refers to cosmic dust that originates from a comet. Comet dust can provide clues to comets origin. Dust and comet origin Microscopic view of comet dust particle The models for the origin of comets are[1]: 1) the interstellar model, 2) the solar… …   Wikipedia

• comet — cometary /kom i ter ee/, cometic /keuh met ik/, cometical, adj. cometlike, adj. /kom it/, n. Astron. 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… …   Universalium

• Comet — This article is about the astronomical object. For other uses, see Comet (disambiguation). Comet Hale– …   Wikipedia

• Comet Hyakutake — C/1996 B2 (Hyakutake) Comet Hyakutake captured by the Hubble Space Telescope on April 4, 1996, with an infrared filter. Discovery and designation …   Wikipedia

• Comet —    The nucleus of a comet is only a few miles across, and made of mostly water ice, with some methane and ammonia. As the comet leaves the area of the Oort Cloud and falls into the orbit of the outer planets, the volatile elements of the nucleus… …   The writer's dictionary of science fiction, fantasy, horror and mythology

• Nucleus — may refer to: Nucleus (atomic structure), the very dense region at the center of an atom Cell nucleus, the control center of a cell, which contains the cell s chromosomal DNA Nucleus (neuroanatomy), a cluster of neurons in the central nervous… …   Wikipedia

• Comet Hopper — (CHopper) Operator Under evaluation by NASA Major contractors UMD, Lockheed Martin, GSFC Mission type Lander Current destination Comet Wirtanen Orbital insertion date …   Wikipedia

• Comet — Com et, n. [L. cometes, cometa, from Gr. ? comet, prop. long haired, fr. ? to wear long hair, fr. ? hair, akin to L. coma: cf. F. com[ e]te.] (Astron.) A member of the solar system which usually moves in an elongated orbit, approaching very near… …   The Collaborative International Dictionary of English

• Nucleus — Nu cle*us, n.; pl. E. {Nucleuses}, L. {Nuclei}. [L., a kernel, dim. fr. nux, nucis, nut. Cf. {Newel} post.] [1913 Webster] 1. A kernel; hence, a central mass or point about which matter is gathered, or to which accretion is made; the central or… …   The Collaborative International Dictionary of English

• nucleus — (n.) 1704, kernel of a nut, 1708, head of a comet, from L. nucleus kernel, from nucula little nut, dim. of nux (gen. nucis) nut, from PIE *kneu nut (Cf. M.Ir. cnu, Welsh cneuen, M.Bret. knoen nut, O.N …   Etymology dictionary

• nucleus — [no͞o′klē əs, nyo͞o′klē əs] n. pl. nuclei [no͞o′klēī΄, nyo͞o′klēī΄] or nucleuses [ModL < L, a nut, kernel, for nuculeus, dim. < nux (gen. nucis), NUT] 1. a thing or part forming the center around which other things or parts are grouped or… …   English World dictionary