NOTE: Taken from another thread on a similar subject: https://www.physicsforums.com/showthread.php?t=125698 "An infinite amount of space with matter uniformly distributed throughout", is not a claim of infinite matter – at least it shouldn't be. If matter is assumed to be inside of a greater space that is infinite – then matter is necessarily less than infinite. I would hope his point, is simply about the uniformity of distribution at the infinitesimal. This is quite possible. Otherwise, it's just a short-sighted rehash of a relative ad infinitum. One way of looking at an open and closed model is this: A closed model has an edge – because matter is outside of space. An open model has no edge – because space is outside of matter. Another way of looking at them is this: A closed model – has both matter and space as finite. An open model – ha both matter and space as infinite. A closed model – has a big bang and crunch. An open model – has no big bang and crunch. Finite – has a beginning and end. Infinite – has no beginning or end. Finite – means the universe began, is, and will stop "actually" happening. Infinte – means the universe is always in the state of potential of "will happen". Either way, however – we can't tell unless we know what is outside the universe. Any description of the universe as "all" – begs the same question. What is outside of it? Space and matter are only capable of being a relative ad infinitum. Without an absolute there is no answer. Is the Absolute inside or outside the universe? It can't be both.