What Does Gravity Have To Do WithThe Expanding Universe?

[vulcanlogician]

think I get what you mean. The universe expands, but not into something. But I'm curious, according to the big bang model (and assuming the universe is finite), is there a place "on the edge" of the universe where one could stand and see the universe in front of him, but if he turns 180 degrees he will see nothing but an abyss? Or does that question even have an answer?

I meant a particular spot in space in the known universe at a particular time.

I know.  But for that spot to be “on the edge”, then there must be something on the other side of the edge that is not part of the universe.   Thus the issue comes back to how do you define universe in such a way that there can be, for the lack of a better term, regions, that are not part of the universe.

Right, I get it. It's like walking on the sphere of the Earth like Polymath said... except you can't leave the surface of the sphere. It's hard to wrap your mind around.