I'm a first year physics student, and I've recently read up on some wikipedia cosmology and talked to some people who are far more experienced in this field than I am. I've come across things such as the balloon analogy, which made sort of sense until I heard that the universe doesn't expand into anything. So, space between objects expands (and accelerated too), but the universe doesn't expand into anything? That doesn't sound right. Seems like a paradox. Now, I know there are paradoxes in nature, but the more I thought about it, the more I thought it seemed like it implied a different explanation. Now, imagine a spherical glass ball in which the universe lies. Imagine, if you will, a cube grid stretching through it. Now, if space expands everywhere, then the balloon analogy would imply more grid space between points, but if the universe doesn't expand into anything, in order to fit the extra grid cubes, you'd have to shrink each cube in size in comparison to the absolute size of the entire universe. What if that's what is happening? It would explain why space seems to expand but the universe doesn't expand into anything (On a related note, how did we find that out?), if, in fact, we were instead shrinking (and, I suppose, diminishing the speed of light by an equal factor). When I asked this question to a friend, I was directed to ask at this forum, and I hope I could get some clarification on this subject.