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(Astronomy) a celestial object, such as a supernova remnant or quasar, that is a source of radio waves
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a cosmic object or phenomenon, as a galaxy, pulsar, quasar, or the remnant of a supernova, that emits radio waves.
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