cluster of galaxies

Gravitationally bound grouping of galaxies, numbering from the hundreds to the tens of thousands.

Large clusters of galaxies often exhibit extensive X-ray emission from intergalactic gas heated to tens of millions of degrees. Also, interactions of galaxies with each other and with the intracluster gas may deplete galaxies of their own interstellar gas. The Milky Way Galaxy belongs to the Local Group, which lies on the outskirts of the Virgo Cluster.

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Universalium. 2010.

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  • cluster — clusteringly, adv. clustery, adj. /klus teuhr/, n. 1. a number of things of the same kind, growing or held together; a bunch: a cluster of grapes. 2. a group of things or persons close together: There was a cluster of tourists at the gate. 3. U.S …   Universalium

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  • cluster — 01. Many of Canada s cities are [clustered] along the American border. 02. The grapefruit was named for the way it grows in [clusters], much like grapes, on the tree. 03. The children all [clustered] around the teacher as she began to read the… …   Grammatical examples in English

  • cluster — I. noun Etymology: Middle English, from Old English clyster; akin to Old English clott clot Date: before 12th century a number of similar things that occur together: as a. two or more consecutive consonants or vowels in a segment of speech b. a… …   New Collegiate Dictionary

  • cluster — 1. noun /ˈklʌstə,ˈklʌstɚ/ a) A group or bunch of several discrete items that are close to each other. A cluster of flowers grew in the pot. b) A group of galaxies or stars that appear near each other. The Pleiades cluster contains seven bright… …   Wiktionary

  • Coma star cluster — > Cluster name = Coma Star Cluster caption=Melotte 111, taken from a rural location in Derbyshire, England in March 2003. epoch = J2000 class = constellation = Coma Berenices ra = RA|12|22.5cite web title=SIMBAD Astronomical Database work=Results …   Wikipedia

  • Coma Cluster — This article is about the cluster of galaxies named the Coma Cluster. For the star cluster, see Coma star cluster. Coma Cluster A Sloan Digital Sky Survey/Spitzer Space Telescope image of the Coma Cluster in ultraviolet and visible light Courtesy …   Wikipedia

  • star cluster — Astron. a number of stars of common origin held together as a group by gravitational attraction. Cf. globular cluster, open cluster, stellar association. * * * ▪ astronomy Introduction  either of two general types of stellar assemblages held… …   Universalium

  • Virgo Cluster — Observation data (Epoch J2000) Constellation(s) Virgo Coma Berenices …   Wikipedia

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