The concept of universe It has its origin in the Latin word universus and is often used as a synonym for world when it is decided make reference to set of all created elements . On the other hand, a universe describes several individuals or pieces that possess one or more traits that are taken into consideration in the framework of a statistical profile work.
Another possible definition of the universe is one that addresses it as everything that can be seen physically . In this sense, the multiple appearances and versions of the subject and the Energy, the physical laws that govern them, and the totality of space and weather .
The main component of the universe is the galaxies , which can be seen with the naked eye as points of light across the sky. Scientists often discriminate against them in various categories and then talk about the galaxies premises (gravitationally linked to the Milky Way , Where is he Solar system ) and outer galaxies. The solar system, formed by several planets, revolves around a common star, the Sun, which attracts them with a strong gravitational power, thus achieving that they always make the same path and do not collide with each other.
It is interesting to also comment that the planet land It's just part of the Solar System, just one of the hundreds of billions of galaxies that make up the universe, and that has about 100 billion stars.
In this solar system there are not only planets near Earth, but also satellites, asteroids, comets and other smaller planets (dwarf planets), which also orbit the Sun. In addition, around this system There are millions and millions of all kinds of stars (dwarfs, pulsars, multiples, supergiants and black holes).
From the beginning of the Universe until today there have been many changes in it, and it is intuited that this may lead to a sure ending, although the positions in this regard are diverse and, as expected, opposed to each other. We cannot know if in the distant future the Universe is going to exist as we conceive it today, because in reality the advances in knowledge scientists regarding their destiny they seem almost nil compared to millions of random endings this system can have.
Theories about origin and end of the universe
There are two absolutely opposite firm theories regarding the true origin of the Universe; these are the theory creationist (whose bases are found in the biblical explanation of the principle, where everything is the work of a god) and the evolutionist (which tries to find explanations based on reliable studies and does not assume anything without having rigorously tested it).
The most accepted theory regarding the emergence of the universe is the one known as big Bang , which speaks of a kind of explosion where all matter and observable universal energy were concentrated at a point of density infinite. After this big explosion, it is said, the universe began to go through a period of expansion that has not yet concluded.
There are specialists who believe that dark matter can cause a force of gravity capable of curbing this incessant expansion of the universe, which would result in a process called as Big implosion . This term, also known as Big collapse It determines that the Universe is a closed system where all changes are cyclical and constant. In this way, it is explained that the detachment of the bodies and that all the components tend to return to their original position, returning to form the Universe as it was before the Big Bang.