a galaxy that emits much more strongly in the radio part of the spectrum than does a typical galaxy.
A mysterious green blob in outer space is named “Hanny’s Voorwerp.” What does that mean, and why is the blob there?Did you catch the story about a giant green blob discovered in a remote section of the universe? An intergalactic blob in and of itself isn’t an appropriate topic for a dictionary website, even if the blob has been shown to move and change color. The reason you are reading about this on Dictionary.com is the mouthful of a name: Hanny’s Voorwerp. The second word is pronounced “FOR-verp.” While the …
The Force at Work: Star Wars WordsWords for a galaxy far, far away… The conversations are flowing, and the debates are raging: Do we call Rogue One: A Star Wars Story a stand-alone? A spin-off? A prequel? An offshoot? A sequel? All of the above? Whether you’re a dedicated contributor to Wookieepedia or just proud of yourself for knowing what a Wookiee is, there are some great words at work in a galaxy …
- radio control,
- radio direction finder,
- radio free europe/radio liberty,
- radio frequencies,
- radio frequency,
- radio horizon,
- radio interferometer,
- radio knife,
- radio microphone,
- radio range beacon
Origin of radio galaxy
First recorded in 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a galaxy that is a strong emitter of radio waves
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.