If we supposed that our universe was created after a big bang and it is still expanding today, that means that our universe is self contained. In fact our own universe is like a big balloon that keeps inflating.We have no way of seing what's outside of our own universe bubble. So here's my questions regarding this.If our universe is self contained, do you think that probably means that there is billions of others universes just like our own outside our universe bubble ? Like there is billions of stars, of galaxies, do you think our universe could be just one of the many self contained universe out there ?If we could get outside of our own universe bubble, what would we see ? More universes ? Nothing ? Or maybe God himself ?What do you think will happen in the future ? Will it keep expanding indefinetaly, will it ever reach a maximum and start contracting into a big crush ?Let me know what you all think ?

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This is an old theory. If it's true, we wouldn't be able to leave our 'bubble' and I don't think there would be a maximum. The Big Crush is just the theory that everything will slow down and then will be close enough for gravity to pull it back in. Another theory is that there have been repeating Bangs and Crushes so our universe is one of many forms it has taken. On that note, these theories are probably all crap.

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