After reading: I wondered about the following thing - is it possible to make a story in which there is a place for a habitable planet and a black hole? (I mean, I have one idea, but it does not end up well... ;) ) I see one additional limitation: the black hole was created in a supernova, so it would have not only exterminated nearby life, but also evaporated nearby planets. Any planet had to be formed later. Black hole as far away accretion disk, which is barely visible on the sky? Boring... Any cool idea?