Hi all, I was bored a little while ago, and somehow started thinking about the Big bang and all that fun stuff. I once heard it said that some of the galaxies near the end of the universe are at close to light speed. Now I'm not here to dispute that (would be nice if it were true though) but another thought struck me. If you had, say, a sun in a solar system moving at close to c away from the center of the galaxy, the orbiting bodies in that system will probably at some point have to be moving in the same direction as it's sun. When you start changing acceleration (or deceleration) at close to c you need enormous amounts of energy to make the shift, something about mass changing at that speed. So wouldn't these orbiting bodies just lose their momentum or something and fall into their sun? What would happen?