Big Bang
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Big Bang

Big Bang is the scientific theory of cosmology, which describes the early development and shape of the universe. The main idea is that general theory of relativity can be combined with observations of galaxies zooming out from each other, which can be inferred state of the universe in the past or in the future. Natural consequence of the Big Bang is that the universe had a history of higher temperature and density. The term "Big Bang" in the strict sense is used to indicate the point in time when the observed expansion of the universe began in a broader sense to refer to the prevailing cosmological paradigm explaining the origin and evolution of the universe. The term "Big Bang" was first used by Fred Hoyle in 1949 during a radio program. Hoyle did not support this theory, and he planned to mock the theory. One consequence of the Big Bang is that the conditions of today's universe are different from those in the past or in the future. Based on this model George Gamow in 1948, predicted the cosmic microwave background radiation that was discovered in 1960 and served as evidence proving that the Big Bang theory was the theory of rebuttal, as usual. In 1927, the Belgian priest Georges Lemaître was the first to submit a proposal that the universe began with the "explosion of prehistoric atom". Earlier, in 1918, the Strasbourg astronomer Carl Wilhelm Wirtz measured the systematic redshift of certain "nebulae", which he called "K-correction"; However, he was not aware of the cosmological implications, nor that the alleged nebulae were actually galaxies outside our own Milky Way.

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The Big Bang Theory:

Under the current physical models the universe 13.7 billion years was in the form of gravitational singularity, in which the measurements of time and length were pointless and temperature along with pressure were endless. At the beginning energy and matter were concentrated in tiny balls of infinite density and temperature of billions and billions of times greater than the temperature of the sun. In a split second, the material particles released and the universe began to expand. Over time, dense clouds formed out of hydrogen and helium. These clouds were collected in dense clusters.

In the beginning, the universe was so dense that even light did not go through it and was very dark. After a several thousand years the temperature decreased to several thousand degrees. The clouds slowly enthused. This meant that the light could move throught it and the Universe became transparent as it is now. The first galaxies are forming into clumps of gas.

About 10 000 million years after the big bang, the sun and the planets of the solar system formed in one of the arms of the galaxy, which was called the Milky Way. Today universe contains countless millions of stars and planets, huge clouds of gas and dust, separated by vast distances of empty space. Even today, some parts of the universe formed. Modern observations of accelerating expansion have led cosmologists to the Lambda-CDM model. This model also contains dark energy in the form of a cosmological constant. This energy causes the increasing proportion of simultaneously visible universe is moving in our event horizon, is outside of our relationship. It is not known what happens after that. The theory of cosmological constant implies that only gravitationally connected systems such as galaxies, will remain together and also their fate will await death from heat because of cooling and expanding universe. Other theories containing so-called dark energy predict that galaxy clusters and perhaps the galaxy itself will eventually be torn action ever-increasing expansion of what is called the Great hilarious.

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