"Limit" to space?

Space is not, "infinite" but rather expanding at a rapid rate. Though in order to expand, something must have something to expand from. So theoretically, at a given moment space does have an edge, where on the other “side” of our universe is an unknown state of being. I also would like to use the theory of the Big Bang to contribute to my idea of space having an "edge" in a given moment. Since scientists have proved that all planets are moving away from each other, that means that space is still in motion and expanding from the "center" of the universe.. and like I said above.. to expand there must be area to expand from..

So what is on the other side? I tried my best to make sure there is no loop logic and that it makes sense.. if something is unclear try to use your imagination a bit.

>>2
If everything in that world is made of marshmallows and our universe is in that world, that would mean our universe is as well.  Any observation would prove that our universe is not made of marshmallow.  Your theory has been tried by fire, and like your precious marshmallows, dropped into the gooey flames of the abyss.