HOW WILL OUR UNIVERSE END?

The Big Bang is the event that started our universe. Most people have heard of it, but what do you know about the Big Crunch? And now I'm not talking about a candy bar. I'm talking about scientists' beliefs about how our universe will one day come to an end. There is a range of theories, such as the Big Fries and the Big Rip, but the one that's considered most likely is the Big Crunch.

The Big Crunch Theory is rooted in Einstein's theory of general relativity. Everything in life follows an ebb and flow, when one event occurs the reverse is likely to occur after hitting the extreme. If the Big Bang caused the expansion of the universe then eventually the opposite will become true, once the universe has reached its largest size. As determined by the amount of energy that's present, it will begin to be collapsed in on itself and in the end form a massive black hole that contains all matter due to the conditions that are present in the singularity of its size. So probably not great news for those who are a class or bacon lovers - it's good news for you!

The math suggests that the Big Crunch is possible and even probable. However, there is a problem for those who dedicate their careers to understanding questions like this: we don't yet fully comprehend everything in the universe. There are a couple of unknowns that will affect our ultimate fate. First, the universe's expansion appears to be the interplay of two factors: density and outward momentum. Density has a direct correlation with the amount of gravity that is present, so the denser the universe is, the more gravitational forces that take place. This on its own would mean that everything will eventually gravitate towards everything else and the final Big Crunch becomes an inevitability. Although there's no friction in space, the effect of gravity would be more than enough to counteract the initial outward momentum caused by the Big Bang and all matter would essentially return to where come from--the problem with this is that observations of the universe have shown that things aren't behaving as simply as we would expect. For example, outer reaches appear to be expanding at a faster rate than those closer to us, and galaxies are moving further apart from each other. Scientists don't know why this is happening, but they have given a name to this unknown entity: dark energy.

The extra element in the expansion of the universe means that there are two possible outcomes - either the universe will continue to expand forever and objects will be so far apart from each other that everything will freeze, or it will eventually contract back together again. If there is enough dark energy present, some scientists believe it could mean the universe will continue to expand indefinitely. Otherwise, gravity will eventually overcome and bring everything back together again.

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We don't fully understand the universe's process, so we can't predict how it will end. One possibility is the Big Crunch, where all matter returns to its origin and leaves a massive black hole. What happens next is unknown, and it could lead to a new universe. This cycle may have already happened multiple times. Only those living for billions of years need to worry about this.