59' Spaceships to other star systems, at relativistic speeds—Hey, isn't it much more feasible to send really large ships, at much slower speeds? Make an O'Neill cylinder, or something even larger, and it's already in solar orbit; how much harder is it to just send it outward, to eventually enter another star system? Yes, we're talking about huge technological advancements req'd, but surely much easier than going 0.5 c, or even 0.1 c.