radio nebula

radio nebula

[′rād·ē·ō ′neb·yə·lə]
(astrophysics)
A nebula that emits nonthermal radio-frequency radiation; derives its luminosity from collisions with the surrounding interstellar medium, or from processes associated with the magnetic fields presumably involved within the nebula; examples are the network nebulae in Cygnus and NGC 443.
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