[dogscoff]

Pretty much, yeah. I suppose you could mod it so that there is an invisible star at the centre of each of those systems. Then you'd be able to destroy that star, but I'm not sure what would happen then. You might be stuck with the same background pic, and you there wouldn't be any asteroids for you to turn into planets. You could build a new star though and create a sphereworld, but I think you could do that anyway.