Rikkitic:
It seems to be generally accepted that the Universe is expanding. In that case I don't see how it can be infinite. I think what confuses people is that space is also expanding, not just the distances between stuff in it. The Universe is not expanding inside a larger volume, like a container of some kind that it is filling up, but it is the expansion. This is hard to grasp. I still see this as the multi-dimensional balloon model, with the centre everywhere on the surface and nothing 'inside'. The reason you can't travel around the sphere and end up back where you started is that the expansion happens faster than you could move at the speed of light, so you would never be able to complete a circumnavigation.
Universe and space are different? The Universe is supposed to be everything. Matter that we see, matter that we dont, and the void inbetween.
There cant be a larger volume as the Universe is everything.
If the balloon model is correct, the Universe is a plane, wrapped as an expanding shere with us on the outer thick surface
The expansion isnt at the speed of light, I recall some large number of planetary expansion, or the speed that matter is speeding away from the big bang point. If light is the expansion speed is the speed of light (you cant get faster) then is the overll void infinite and the universe is just where matter and light is?