Quote Originally Posted by Eric B View Post
After reading Brian Greene's treatment of string theory, where he mentions spacetime as itself having strings as its quanta, then it becomes conceivable for there to be an end to space. What would happen, is once you reach a certain point, the strings stop, and you are no longer in space or time. That of course also means your matter (also made of strings, of course) instantly disappears as well. Everything just ceases to exist past this edge. The same thing actually happens if you decrease size to below the Planck length.
What I've just realized, is that if there was an "edge" like that, what inertial frame of reference would it lie in? That would form an absolute state or "rest" that every other object could be measured against.

If the universe is expanding, and expanding faster the further you go out, then the edge would likely be at the limit of the speed of expansion, and basically moving outward at the speed of light. (They even say the expansion is over faster than light). So such an edge would not be reachable by anyone.

I don't know what would happen regarding time. If that's supposed to be infinite, and space would expand forever (even after the "Big Chill").