Re: Okay, planets. Why not ?
Black holes suck in everything, including any energy that might be around.
Black holes, or rather their accretion disks, are among the most luminous objects we know. The most luminous ones are thousands of times brighter than entire galaxies such as ours. Lack of energy is not the problem here: too much energy at too short a wavelength probably is (life, as we understand it, doesn't do very well in hard-x-ray environments).
