Yadiastun makudang-kudang gelombang radio kapancarang langsung olih objek astronomi, produk emisi termal, atengah saking emisi radio sané kaselehin wantah asil radiasi sinkrotron, sané kapolihang rikala elektron mengorbit medan magnet.
Though some radio waves are produced by astronomical objects in the form of thermal emission, most of the radio emission that is observed from Earth is seen in the form of synchrotron radiation, which is produced when electrons oscillate around magnetic fields.