My theory, like that of many scientist, is that the space is always expanding, expanding at a rate that too fast to actually caculate. But...to me...it is very hard to think that something like space has no end...very. I ponder about this so much...man it's just so confusing. Something like the fact there is no gravity out there, and that there is no up or down or any sense of direction, is something that I can imagine. But space being endless, without any boundries? Subjects like astronomy, the Big Bang Theory, and space really interest me. New question: Does anyone think that their could possibly be other dimensions?