[gregebowman]

I think that it's misleading by calling it a sphere world. Sure, once you surround a star and maybe use it's planets as the raw material to make this sphere, then it might be called a sphere world. The only example I've seen in tv or movies was the TNG episode where they find Scotty on the outside of one. Unfortunately, they never really got to explore the "planet", but I would have loved to see them do it. I think there was a Star Trek novel dealing with such a world (called a Dyson's Sphere), but I can't remember now if it was TOS, TNG or Voyager.