What is universe?

The concept of universe has its origin in the Latin word universus and is often used as a synonym for world when it is decided to refer to the set of all created elements. On the other hand, a universe describes several individuals or pieces that present one or more traits that are taken into account in the framework of a statistical profile work.

Another possible definition of the universe is one that approaches it as everything that can be physically appreciated. In this sense, the multiple appearances and versions of matter and energy, the physical laws that govern them and the totality of space and time are included.

The main component of the universe are galaxies, which can be seen with the naked eye as points of light in the sky. Scientists tend to break them down into several categories and then speak of local galaxies (gravitationally linked to the Milky Way, where the Solar System is located) and outer galaxies. The solar system, made up of several planets, revolves around a common star, the Sun, which attracts them with strong gravitational power, thus ensuring that they always follow the same path and do not collide with each other. It is also interesting to note that planet Earth is just one part of the Solar System, just one of the hundreds of billions of galaxies that make up the universe, and that it has around 100 billion stars. In this solar system there are not only near-Earth planets, but also satellites, asteroids, comets and other minor planets (dwarf planets), which also orbit around the Sun. Furthermore, around this system there are millions and millions of all types of stars (dwarfs, pulsars, multiples, supergiants and black holes). Since the beginning of the Universe until today, many changes have taken place in it, and it is intuited that this can lead to a safe end, although positions on the matter are diverse and, as expected, opposites. We cannot know if in a distant future the Universe will exist as we conceive it today, because in reality the advances in scientific knowledge about its destiny seem almost null compared to the millions of random ends that this system can have . Theories about the origin and end of the Universe There are two firmly opposed theories about the true origin of the Universe; They are the creationist theory (whose bases are found in the biblical explanation of the principle, where everything is the work of a god) and the evolutionary theory (which seeks to find explanations based on reliable studies and which does not assume anything without having rigorously proven it).

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The most accepted theory about the emergence of the universe is known as the Big Bang, which speaks of a kind of explosion where all the observable universal matter and energy were concentrated in a point of infinite density. After this big explosion, they say, the universe began to go through a period of expansion that has not yet ended. There are experts who believe that dark matter can cause a force of gravity capable of slowing down this incessant expansion of the universe, which would result in a process called the Great Implosion. This term, also known as the Great Collapse, determines that the Universe is a closed system where all changes are cyclic and constant. In this way, it is explained that the distancing of bodies gradually ceases and that all components tend to return to their original position, forming the Universe again as it was before the Big Bang.

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