I was mulling over this morning something I probably have no business thinking about, the finite attribute of space. Is it? Well, when we consider things to be infinite, we normally mean things that exist, but the problem with space is that it is the manifestation of not existing. Which in turn is what makes us think of it as a thing. Now, space being empty doesn't make it big or small, and in effect, the universe could be a finite lump of exploding matter in a very much inifinite space time, but there is the problem of those pesky virtual particles. The matter anti-matter things that cause hawking radiation. If they are all over the whole universe, then matter itself and the universe that we consider to be the existent universe is inside something that allows for this background noise. Unless the background noise, the virtual particles, are actually caused by the big bang as well. Are these virtual particles just the result of too many gravitons or some other thing hanging around in the massy universe?
As you can probably tell, I'm not a physist. Maybe one day I'll go for that degree and then I'll understand all this mess in my head.