I've been reading a bit lately about the possible fate of the universe. So far I've seen a few models, and they all seem interesting to me. I've seen threads about these prophecies individually, but I'm not entirely sure which one is most plausible, so I'm curious as to your ideas. First off is the Big Crunch, the idea that when there is enough matter in the universe, gravity will cause the expansion to move backwards, thus collapsing the universe into a black hole singularity.The next one I found was called the Big Chill, the idea that as the universe is expanding, matter will get spread more and more thinly, until the temperature approaches absolute zero.After that, there is the Big Rip, which says that since the fabric of the universe is constantly expanding, the observable universe is shrinking, and that when the size of the observable universe is smaller than any particular structure, tearing will occur.Finally there is the Big Bounce, which says that we live in an oscillating Universe, and that everything moves in a cycle, and after our universe collapses, there will be another Big Bang.
These are all very brief summaries that I pieced together from several different resources. I'm not so sure of how accurate they are, but it has been interesting to read. Seeing as I don't know much about astronomy, I'd like to hear everyone's opinions on which one is more likely, and any possible corrections to the summaries that I've given.