The conversation between human and AI assistant.
Does universe have a center of mass?
Are there any theories about how the universe will end?
Yes, there are a few different theories. One is that the universe will continue to expand indefinitely, eventually becoming so spread out that stars and galaxies will no longer be able to form. Another theory is that the universe will eventually stop expanding and start contracting, leading to a "Big Crunch" where everything collapses back in on itself. However, currently there is not enough evidence to favor one theory over another.