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

“We speculate that they may represent a spherical shock wave from an extra-galactic transient event, or the outflow, or a remnant, from a radio galaxy viewed end-on,” the scientists wrote.

From Fox News

As MeerKAT perused the showstopping radio galaxy, the cryptic filaments bridging its two jets came to light.

From Scientific American

“In some cases, the radio galaxy can have a great deal of obscuring dust, and you wouldn’t be able to see anything—or almost anything—with an optical telescope,” says Rich.

From National Geographic

Through optical telescopes, the first known radio galaxy, Cygnus A, looked like two galaxies colliding.

From Scientific American

In January, astronomers used the two sites to observe Sagittarius A* and Centaurus A, a radio galaxy 10 million light years from Earth whose nucleus contains a black hole with the mass of 55 million suns.

From Scientific American