Off the cuff thought: the overall universe is infinite and not expanding, and it&#x27;s only the visible universe that&#x27;s expanding into that infinite space.<p>Now try to wrap your mind around this: someone that&#x27;s one light year to the left is going to see a slightly different visible universe, also expanding, into the same infinite space. But if we look in their direction, we see the edge of our visible universe expanding into the void, but from their point of view looking in the same direction our edge is one light year short of their edge. So what&#x27;s our edge expanding into?