[Mr. Nobody]

I like to consider the simplest solution. That there is no center and no edge of the universe and that what we perceive as the edge of information constitutes the limits of our reality.
Space is curved, and the further out we view, the more angled the path of light (information) becomes. However, since we experience an expansion, we will never be able to close this loop, in other words, we will never see the back of our head.
For me curved and closed shapes are the simplest representations of infinty, things with no beginning and no end. The shape of a circle from a line or a sphere from a surface are everyday examples of infinty in the lower and finitness in a higher dimension.
Space is both infinite and finite