There is a system of one star and something like an asteroid belt around it. But the distance between asteroids is much less than usual, with some perhaps within nine kilometers of each other, and sometimes even less (there can be closer proximity, to several meters, and collisions are very frequent). Also, it is an inhabited place, so there's oxygen and something does not allow to fly it away. From inside this looks like millions of flying islands.
So how this can be possible?