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| determined by or pertaining to the stars |
| the magnitude of a star as it would appear to a hypothetical observer at a distance of 10 parsecs or 32.6 light-years |
| radio source | |
| —n | |
| a celestial object, such as a supernova remnant or quasar, that is a source of radio waves | |
radio source
in astronomy, any of various objects in the universe that emit relatively large amounts of radio waves. Nearly all types of astronomical objects give off some radio radiation, but the strongest sources of such emissions include pulsars, certain nebulas, quasars, and radio galaxies.
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