Cosmos and Dark Matter
Introduction
Cosmos: dark matter, dark energy. Dark matter. When calculating the total mass-energy of the universe, astrophysicists find that barionic matter, the type composed of atoms, represents only about 4 percent of the total mass-energy of the universe. The remaining 96 percent of the dough is approximately 21 percent of dark matter and 75 percent dark energy. Dark matter has been impossible to investigate directly because it does not interact with electromagnetic radiation – visible light, infrared, etc. So far it has been identified only by its effects.
Developing
Especially its gravitational effects on galaxies and other large -scale entities, and also because of its influence on cosmic background radiation. Hubble: dark matter, normal matter. In the early universe, dark matter played a dominant role in the formation of the first galaxies. The cold gases of the universe gravitated towards dispersed dark matter densities. Where sufficient gas accumulated, clusters of stars and galaxies were formed. Astronomers maintain today that each galaxy is wrapped in a halo of dark matter, and the halo applies so much force that the outer edge of a galaxy rotates as fast as the deep inside.
It is the halo of dark matter that prevents a galaxy from separating. Astronomers discovered dark matter by inference when they tried to explain the fact that the outer edge of the galaxies revolved unexpectedly. This unexpected phenomenon could happen only in the presence of a tremendous force. In addition, the calculations showed that the mass of the galaxies exceeded by far the mass of their respective barionic matter. These findings indicated the presence of some other type of matter, a much more massive type than barionic and virtually invisible matter. Dark matter does not interact with our normal matter except for its gravitational firm.
There are many candidates for the source of dark matter. Neutrinos were of interest for some time, since these particles are especially abundant in the universe and do not interact with Barionic matter. However, neutrinos represent only a tiny percentage of the total amount of dark matter. A predicted particle for string theory, neutraline, is another candidate;And another possibility is a theoretical particle called axion. Part of the elusive dark matter can be barionic matter of a particularly type that does not interact. But all these candidates are speculation at the moment.
conclusion
One of the objectives of the Great Hadron Collider of the CERN is to identify the dark matter. Dark energy. As dark matter, dark energy is understood by its effects and scientists really have no idea what it is. It is the force that is believed to be responsible for the accelerated expansion observed of the universe. In that expansion, the most distant objects of us move away faster than those closest. Dark energy is one of the greatest mysteries in the universe, subject to a series of hypothesis. You may have to expect a real explanation waiting for a technological probe that is able to analyze it.
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