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.
Although some radio waves are emitted directly by astronomical objects, a product of thermal emission, most of the radio emission that is observed is the result of synchrotron radiation, which is produced when electrons orbit magnetic fields.