@pyko,
I would like to address a few things that I saw repeated here several times which is not quite accurate.
"Space is an empty void of nothingness"
Not true. Space is not nothing, it is something yet we don't actually have a firm grasp of what to make of it. Sure it is not like the material substance of atoms that fill up the space, but it is still something. In theoretical physics space is energy. Sure it's not the same state that you see other energy such as light, sound or heat but it is still a state of energy. This mistaken view of space being nothing or a void is where people get into trouble when they talk about the expansion of the universe or what is the universe expanding into.
By the way I love the question posed by the OP and I have asked and pondered similar ideas and questions myself. For example along a similar line of reasoning as the original question;
If the universe has an edge, what is the edge made of? What determines the edge of the universe, what's there? Is it some kind of barrier, some kind of skin that you can't penetrate?
I have some conflicting answers of what I consider the universe. I actually say that since space is energy it can be manipulated by matter and this is why it appears to be expanding when in fact it is not expanding but instead the matter, the atoms with the space is what is moving and manipulating the space around it as it moves. In other words the space of the universe is actually infinite, however the atoms the matter of the universe is not infinite.
To put it another way, the space is not actually being stretched, it only appears to be that way because there is matter interacting with it. If space were nothing, then by all means the matter would probably have no effect but since space is actually energy, matter impacts it.
So if you buy anything that I have said here, then by all means, the universe does not have an edge, however there could be areas of the universe where there is no matter or atoms or molecules or physical states of energy. These shouldn't be called voids though, they still contain energy.
The big bang theory for me does not include space itself, space for me has always existed and time has always existed. However the matter in the universe is in a state of constant flux. In fact I propose that there probably wasn't a single bang event but instead there are many different bangs. My theory is that when you get a certain amount of matter condensed down to a certain point something occurs and it ruptures and the matter contained within that point spreads out and the process repeats.
We happen to be within one of these explosions of matter and since our view on the universe is very limited in scope to our size and relative size of how far we can observe we are under the impression that there is only one event. However; I could be mistaken but it solves a lot of problems in theoretical physics to not have an edge to the universe. I know conveniences should never be considered as solutions.
