Complex sentence: The observed radio and infrared energy emanates from gas and dust heated to millions of degrees while falling into the black hole; the black hole itself emits only Hawking radiation at a negligible temperature, on the order of 10 − 14 kelvins.
Split into simpler sentences: The observed radio and infrared energy emanates from gas and dust heated to millions of degrees while falling into the black hole. The black hole itself emits only Hawking radiation at a negligible temperature, on the order of 10 − 14 kelvins.