universe is The union of all that exists . Whether it is a substance such as planets, stars, or galaxies, or on the other hand, non-material such as energy, space, or time. That is why we can say that the universe is the place and time in which the planets and their physical laws that govern them (such as the law of gravity) exist.
The universe, in general, Consists of interconnected galaxies that give rise to groups of galaxies Which in turn are linked to other groups, thus generating a cosmic network that expands throughout the universe.
The universe has a variable extension and is difficult to calculate because It could, in turn, contain other universes . In contrast, many times we tend to think that the universe is static but the truth is that it is a changing place full of phenomena.
The Big Bang Theory is the most widely accepted scientific theory About the origin of the universe n. It proves that approximately 13.7 billion years ago, all mass and energy (the universe) was concentrated in a very small and very dense point that exploded, giving rise to space, time and the set of fundamental particles that together made up matter and energy.
Based on the Big Bang theory Its foundations are based on Einstein’s general theory of relativity , and concluded that the universe is not static, but is constantly expanding and moving. This theory also defends the idea that the universe is finite, that it has an origin and that it will in turn have an end.
Will the universe have an end?
Currently there are a number of theories that explain after the hypothesis how they think the end of the universe will be. first of all, We can talk about the big freeze model which posits that the continued expansion of the universe will (within a billion years) lead to the extinction of all stars, resulting in a cold, dark universe.
We can also mention The Big Rip Theory (or Big Tears) which suggests that the more the universe expands, the more dark energy is generated, arriving at a moment in time when dark energy will overcome gravity, breaking the balance that exists between them. Both forces and generator break up any type of material.
finally , There is talk of the Big Crush phenomenon which advocates the contraction of the universe at one point after its maximum expansion, giving rise to a new Big Bang.