radio galaxy

noun

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

radio galaxy

noun

1. a galaxy that is a strong emitter of radio waves

radio galaxy

1. 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.
2. See also Seyfert galaxy

Word History and Origins

Origin of radio galaxy¹

First recorded in 1955–60

Example Sentences

A giant radio galaxy with plumes of electrons stretching nearly 5 million light years from top to bottom of the image.

From Singularity Hub 

Not likely, because the ORCs are very distinctly circular, unlike the tangled clouds we see in radio galaxies.

From Singularity Hub