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globular cluster |
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globular cluster: see star cluster star cluster, a group of stars near each other in space and resembling each other in certain characteristics that suggest a common origin for the group. Stars in the same cluster move at the same rate and in the same direction. ..... Click the link for more information. . globular clusterAny large group of old, Population II (see Populations I and II) stars closely packed in a symmetrical, somewhat spherical form. About 150 have been identified in the Milky Way Galaxy. Most are distributed in a spherical volume above and below the Galaxy's disk (see galactic halo). Globular clusters contain many more stars (10,000–1,000,000) than open clusters do and can be several hundred light-years in diameter. Because they are so distant from the solar system, most are not visible to the unaided eye. Omega Centauri and a few others can be seen without a telescope as hazy patches of light. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Irwin of the University of Cambridge in England and his colleagues found 14 previously unknown globular clusters surrounding Andromeda. A little later the Milky Way, the edges of the northern Milky Way, would be coming up, and we'd see globular clusters, which are on the fringes of the galaxy. The dynamics of open and globular clusters and spiral arms will be revealed to SIM scientists. |
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