Quote from: TommyJ
'Black' means darkest observable space (even light cannot escape)Steven Hawking identified a way that light could escape from a black hole, through the eponymous Hawking Radiation.
- The light has a "black body" spectrum
- Although, with a stellar-mass black hole having a black body "temperature" of nanoKelvins, you would be hard-pressed to detect it.
- The peak emission would be in long-wave radio spectrum, rather than in visible light
Quote from: Halc
It gets more complicated with something like a Kerr black hole where orbits become non-circular.Due to the formation of stellar-mass black holes from the collapse of a rotating star,
- or their mechanism of growth, fed by a spinning accretion disk,
- you would have to assume that most black holes are "rotating" (ie have angular momentum), ie are a Kerr black hole.