Just sat down and watched an episode of Star Trek The Next Generation. The episode was "Relics". In it, the crew comes upon what is termed a Dyson's Sphere. This sphere is constructed completely around a star at the distance the Earth is from the sun. Inhabitants can then live on the inside skin of the sphere. Interesting.
I checked the web, There was actually a Freeman Dyson. But, given the task, and assuming that we could accomplish such an engineering feat, would something like this work? Or is it a baaad case of Bad Astronomy? I'm jsut thinking about the ramifications of the solar wind against the inside of the sphere. It could turn into the universes's largest microwave oven!!