What Is Big Crunch Theory ?

Big Crunch
Image Source : Wikipedia .

The Big Crunch: The End of Our Universe?

Our Universe can end just like the above gif because of the big crunch . The Big Crunch is one of the scenarios predicted by scientists in which the universe may end. Like many others, it is based on Einstein's theory of general relativity. That is, if Big Bang describes how the Universe started the most, Big Crunch describes how it will end as a result of that beginning.

This tells us that the expansion of the Universe, which is due to the Big Bang, will not continue forever. Instead, at a certain time, it will stop expansion and collapse in itself, pulling everything along with it until it eventually turns into the biggest cold. Well, we all know how everything gets squeezed when it goes into that hole. Hence the name Big Crunch.

For scientists to predict with the possibility of a Big Crunch, they must determine some of the properties of the universe. One of them is its density. It is assumed that if the density is larger than a certain value, known as the critical density, then an eventual collapse is highly probable.

How The Big Crunch Can Happen .

Image Source : science.howstuffworks

You see, initially, scientists believed that there were only two factors that greatly influenced this expansion: the gravity of attraction between all galaxies (which is proportional to density) and their outward motion due to the Big Bang. Force.

Now, like any body that goes against gravity, e.g. When you throw something, that body will finally give in and come back down, until some other force pushes it.

Thus, the force of gravity would win in the end, at what once seemed like a logical prediction. But until scientists came to know that the Universe is actually increasing the rate of its expansion into areas far away from us.

Video source: YouTube Channel Unveiled

To explain this phenomena, scientists had to assume the presence of an unknown entity, which they dubbed ‘dark energy’. It is widely believed that this entity is pushing all galaxies farther apart. With dark energy, and what little is known about it, in the picture, there seems to be little room for the possibility of a Big Crunch.

Right now, measurements made by NASA’s Chandra X-ray observatory indicate that the strength of dark energy in the University is constant. Just for added information, an increasing dark energy strength would have supported the possibility of a Big Rip, another universe ending that predicted everything (including atoms) to be ripped apart.

Even with an unchanging dark energy strength, an ever expanding universe is still the most likely scenario. So unless data that contradicts these properties are collected, the Big Crunch will have to remain as a less favored theory.