Where did the universe come from?

Theories and hypotheses about the origin of the universe are a huge set, they are all different and all answer one question: "Where did the universe come from?" The most interesting thing is that when you consider one theory, analyzing it, you become its supporter, until you turn to studying another theory, which, in turn, convinces you of your own rightness - and so on without end. Perhaps people will not soon be able to find the right answer to the question of where the universe came from.

If we take the oldest theory of the origin of the universe, then, in accordance with the undeniable for many sources - the Bible - the world was created by the Creator approximately in 5508 BC. This theological hypothesis of the origin of the world is fairly well known, but it is held, in the main, by representatives of the clergy and especially faithful people. Scientists who question everything and everything, including the existence of God, naturally have a different idea of the origin of the world.

If you look at the explanatory dictionary, the Universe is a system of the universe, which includes all the cosmic space and the celestial bodies in it. The alternative definition of the universe is "a cluster of stars and galaxies."

The most common scientific hypothesis, explaining where the universe came from, is the theory of the "Big Bang".

According to it, about 20 billion years ago the entire universe was substituting a very small substance, smaller than a grain of sand. However, despite the tiny dimensions, the density of this substance was enormous: about 1100 g / cm3. Of course, there were no stars, no planets, no galaxies to which we were accustomed, but it was an embryo, potentially capable of creating all this diversity of celestial bodies. This substance can be compared to a small seed, from which a powerful and branching tree subsequently grows.

It is because of the high density of the original substance that an explosion occurred that divided this smallest particle into billions of smaller particles - from them the Universe subsequently emerged.

There is another hypothesis about a big explosion, answering the question, where did the universe come from. In principle, the essence of these two theories is almost identical, except that in this hypothesis, instead of the substance from which the universe appeared, a physical vacuum appears. That is, the whole world was due to an explosion in a vacuum environment.

Vacuum in Latin means "emptiness", but the meaning of this concept is much broader: vacuum is not a void in the conventional sense of the word, but a state in which all things are hidden and potentially contained. Vacuum has the property of changing its structure - just as water turns into ice or steam. In the process of changing this structure, an explosion occurred, which caused the birth of the universe.

In addition to the theological and scientific hypotheses explaining where the universe came from, there is also a scientific and philosophical point of view on this problem. She considers the fundamental possibility of creating the universe some higher reasonable beginning. Such a theory implies that the world did not always exist: it has its own starting point, even more - the whole universe is constantly evolving and growing.

To this conclusion scientists came to study the composition and the brightness of stars. Thus, in the 1930s, when studying the Milky Way, it was established that the light emitted by the stars was shifted to the red region of the spectrum. The farther the distance from us to the star, the more this shift is more pronounced. It is this observation that gave scientists information that the universe is constantly expanding.

The second scientific fact, which confirmed the development of the universe, was the "death" of stars. Based on the chemical composition of the star, its body consists of hydrogen, which constantly participates in various reactions, turning into heavier elements. When hydrogen is depleted, the star "dies". According to some theories, all the planets of our system can be the result of "death" of stars.

This discovery gave grounds for one more conclusion: since the decomposition of hydrogen is a natural and irreversible process, the Universe naturally and gradually moves to its end.