One possiblity is that the Universe will come to an end in the opposite of a Big Bang called The Big Crunch. At one point, the universe will have enough matter in it, that it stops its expansion, and it's gravitational force is reversed, so that it starts to collapse into its self, to the point at which it began. Based on the latest observations, we conclude that the expansion will continue forever. The Future of the Universe The Big Bang model describes the current universe as expanding. In the 1970s, the future of an expanding universe was studied by the astrophysicist Jamal Islam and the physicist Freeman Dyson. That means all of these predictions could be wildly wrong… but it also means any of them could come true, no matter how implausible you think it is. I’ve written before about how hard it is to get the future right, thanks to the insane complexity of the system in question (also known as “the entire universe”). Based on what we know, there are four ways the Earth will meet its eventual end, and they're all going to happen someday. Fred Adams and Gregory Laughlin have written a very good article on the future of the universe. But that’s not the end — even black holes die, eventually. Our galaxy will be alone in the visible universe. Free will is not in the contradiction to the idea that everything happened already, and will happen in the future. Here's what that's going to … How will the universe end? In our current view of the Universe there are 2 possible futures. "Not with a bang but with a whimper," wrote the American poet T.S. Another theory is the Big Crunch theory, which is the opposite of the big bang. Eliot regarding the end of the world. A decillion (10^33) years into the future, black holes will dominate our universe, ushering in a new era called the Black Hole Era. What will happen to Earth, the Solar System, and the rest of the universe as time goes by? Before then astronomers assumed the universe’s expansion rate would be decelerating instead.
It will take a hell of a long time, but that's what will happen. This was something that was first discovered in the 1990s and it took everyone by surprise. Our picture of the universe has changed more in the past decade or so than it did in the past century. But if they don’t, the singularity will have ushered in a delicious irony: For most humans, the future could look more like Witness than it does like Blade Runner. What will happen to the universe in the future is the universe will grow so big that all the dark matter and gravity in the universe would reverse. We can learn a great deal about our universe by looking into the sky, we can also determine its future. Future history. And then, once the stars burn out, the universe will be truly cold, dark and empty.