radio galaxy

noun

a galaxy that emits much more strongly in the radio part of the spectrum than does a typical galaxy.

Origin of radio galaxy

First recorded in 1955–60

Words nearby radio galaxy

radio compass, radio control, radio direction finder, radio free europe/radio liberty, radio frequency, radio galaxy, radio horizon, radio interferometer, radio knife, radio microphone, radio range beacon

British Dictionary definitions for radio galaxy

radio galaxy

noun

a galaxy that is a strong emitter of radio waves

Scientific definitions for radio galaxy

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.