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radio galaxy |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.03 sec. |
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radio galaxy [′rād·ē·ō ′gal·ik·sē] (astrophysics) A galaxy that is emitting much energy in radio frequencies often from regions devoid of visible matter. 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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To find a cluster of more distant galaxies, Dickinson's team looked for objects grouped around the radio galaxy 3C324, observed as it appeared when the cosmos was one-third its current age. She and her colleagues analyzed the spectra of ultraviolet light recorded by the Hubble Space Telescope to confirm that a quasar lies at the center of Cygnus A, the brightest radio galaxy in the northern sky. According to Steve Rawlings and Mark Lacy of the University of Oxford in England and their coworkers, several lines of evidence suggest that the radio galaxy dubbed 8C 1435+635 lies some 12 billion light-years from Earth. |
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