As creepy as it sounds, the universe we live in will eventually end. So how will the universe end and when will the universe end?
If there’s one thing we know for sure as humanity, it’s that everything has an end. Everything from the simplest to a living being to the great celestial bodies has an end. So we know that one day our universe will disappear.
Scientists working on astronomy and cosmology (the science of the universe) do not have a definite idea of what our universe will end up like. Currently, there are 3 main theories for the end of the universe: The Big collapse, the big rupture, the Big Freeze.
When Will The Universe Disappear?
First, let’s say that extinction will occur in billions of years, and none of us will be able to witness it. According to experts, the extinction of the universe will occur between 20 billion years and 100 billion times more years later. So the universe will continue to exist for a very long time.
How Do We Know The Universe Will Disappear?
In the introduction of our article, we mentioned that everything has an end, and therefore our universe also has an end. Yeah, nothing lasts forever, and our universe won’t. But we are not saying on hypothetical grounds that our universe will disappear. According to the second law of thermodynamics, abandoned systems on their own behave inclined to decay. That’s why we know that one day our universe will disappear.
Theories For The End Of Our Universe
Scientists have 3 different theories about the end of our universe.
- Big Crash
- Big Freeze
- Big Rip
Two of these 3 scenarios are based on our growing universe growing as it is now, starting with the singularity with the Big-Bang. Another argues that this growth in our universe will one day reverse and shrink, ending the universe.
The theory of the Great Collapse, or in other words the Great Collapse, was put forward by Aleksandr Fridman, a Russian-born scientist, in 1922. This scenario is based on an increase in the amount of gravity that the universe grows even larger. As a result of the increased total amount of mass and, accordingly, the increase in gravity, the growth of the universe will slow and stop. Then the universe will begin to contract and disappear, drifting into a great collapse, turning into an initial singularity.
But the Great Collapse is considered a problematic theory today. Because research has proven that increasing gravity in the universe does not have an effect that slows growth, or even increases the growth rate. For this reason, the great collapse theory is now largely obsolete.
But this theory has still not been completely shelved. Because we don’t know much about Dark Energy, which is seen as the main source of expansion in the universe, we don’t know the effects it could have in the future.
In this theory, the growth of the universe was based on the acceleration and increase. As we know, our universe is currently expanding at a great pace, and the rate of expansion is constantly increasing. In this scenario, the expansion of the universe will be so large at a certain time that even the two closest particles in space will be a few light years away. For this reason, the heat differences between objects in space will close, and then the stars will run out of fuel, galaxies will die, and even black holes will evaporate. And then the energy that goes around under the influence of expansion will stop as time goes on and everything will reach almost absolute zero.
Of course, there are situations that can create certain inconsistencies for this theory. This scenario has no certainty, as it is not known whether dark energy will prevail over gravity.
In the theory of great rupture, it is also based on the fact that growth in the universe will lead to extinction. The dark energy that causes the universe to expand is increasing and therefore our universe is accelerating and expanding. According to scientists, the universe will expand even in subatomic dimensions at some point, and everything will be divided into its atoms. As a result, the universe will end.
3 theories that were most supported by scientists about the end of the universe were in this form. The biggest reason we can’t fully prove or refute all 3 theories is dark energy. As the secrets of dark energy, about which we know almost nothing yet, begin to unravel, we will also be able to find answers to many questions about our universe