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radio galaxy

   Also found in: Encyclopedia, Wikipedia 0.02 sec.
radio galaxy
n.
A galaxy emitting large amounts of radio energy.

radio galaxy
n
(Astronomy) a galaxy that is a strong emitter of radio waves

radio galaxy
A galaxy that emits large amounts of radio energy. Radio galaxies are typically elliptical galaxies with large symmetrical lobes. The centers of radio galaxies are active galactic nuclei, and many expel one or more jets of matter directly from the nucleus that can be observed in the visible spectrum and extend for millions of light-years. See also Seyfert galaxy.


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Although much of the structure of this radio galaxy was known already, we now see some terrific detail, and it's a beautiful image," he said.
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.
 
 
 
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