:
|
Wouldn't it be coloured reddish, due to the constant effect of the Redshift phenomenon? I mean, a black hole keeps sucking in matter, and that matter will change colour, seen from the outside. It'll change towards the red side of the spectrum, and then dissapear. At the same time, another piece of matter enters the gravitational pull, thus starting that cycle again...
|
Actually, yes. Quasars, which are swirling disks of hot gas, plasma and other spacial detritus, are thought to contain a black hole in the center. I'm not sure that you can see this far into it, but the gas closer to the black hole itself would take on a reddish hue on account of the light waves becoming elongated due to gravity.
To put it more simply, astronauts turn red as they fall in.