Quote (bentherdonethat @ Feb 26 2011 08:43am)
A giant ship and a small planet evoke two ENTIRELY different mental images. The idea of us building and moving a planet into deep space is completely unfathomable with our current technologies, whereas at least a large ship can be imagined, even if moving it wouldn't be that fuel efficient (Hohmann transfers are very slow and would only work far enough to get us out of the solar system, and after that it'd take generations to reach the next closest star).
ya there is no way it could happen with current tech and it would be a waste realistically even with the tech. the only way i see it ever being created would be as an experiment in deep space colonization. a sphere does promote a lot of problems though so a half/half construction would be more realistic since it would be much more manageable to create an earth-like environment on a flat surface.