Astrophysical black holes do not themselves radiate. The temperature associated with Hawking radiation is TH = (ℏc3)∕(8πGM kB). For a stellar-mass black hole TH ∼ 10−8[∘ K ]. Thus, Hawking radiation is completely suppressed by the thermal bath of the 3[∘ K] cosmic background radiation. For supermassive black holes, the Hawking temperature is at least five orders of magnitude smaller still.