The Universe is constantly expanding, and from the observation of Hubble, super novas, the figure turns out to be a acceleration. The theory that's most accepted seems to be dark energy at work. As the story goes, before big bang, there was nothing, maybe not even time or space, so how does something expand into nothing? I mean, if gravity slows us down and if dark matter is repelled by gravity (according to some theories), and then dark matter is what fills up the space for universe to expand to, shouldn't we slow down? I understand this is a impossible question with no definitive answer, since we can't even answer what's outside the universe (some say extreme heat, then there's the multiverse idea and also plain nothing). But this is all just mind spinning. If gravity is caused by a warp in space time, does space time also be stretched as the universe is expanding? I mean, the thing should be created by big bang right? else anything that was here before it should've been pushed back as the universe expands. What if there IS something outside the universe? substance that attract matter? I mean, space time seem pretty consistent whether here on earth or some place a few million light years away, so what if space time isn't expanding and accelerating, just us and matter/energy? farther we travel faster we go? all our observation comes from observing stars and explosions. Would this be a possibility? (probably just random B.S.) But really, the lack of possible explanation and info on this just send my head into oblivion, I need help . Please offer some sort of wild explanation or good reasoned ones, maybe even ideas on how I can stop thinking about this question from time to time. Thank you all for taking your time to read this nonsense.