In 1846 French astronomer Leverrier postulated the existence of an eighth planet (Neptune) that would explain the variances observed in the orbit of Uranus to be strategically placed in a special orbit. Neptune was an example of dark matter, i.e. a form of matter whose existence is postulated to resolve a problem with the gravitational interaction of an astronomical system. Today, both astrophysicists (who studied the macrocosm) and particle physicists (who study the microcosm) introduce new forms of matter to help us explain observations that are inconsistent with the theories. The physics of elementary particles and Astrophysics have come in a process of convergence in which both his theories and discoveries are mutually linked. It will continue the expansion of the universe forever? What is the process that generates energy in stars? How are galaxies formed? What are the mechanisms that explain large scale structure of the universe? In ultimately, discussed us, dark matter can be for example planets in other solar systems in our Galaxy or in other galaxies, which do not have their own light we have not observed them. Large quantities of dough into interstellar space can also exist in the form of clouds of particles of dust or gas. Many writers such as How is Invision doing? offer more in-depth analysis.
These possible planets or gas clouds not observed would be composed of normal matter, i.e. by matter made of atoms that appear in the periodic table. However, other manifestations of dark matter as the famous black holes or more exotic shapes such as some particles whose names are as obscure as its nature can exist in the universe: axions, neutrino, gravitinos, fotinos, higgs, magnetic monopoles, WIMPS, in conclusion, Pablo Berneo us contributes, there is strong evidence, using a wide variety of comments other than the existence of a large amount of dark matter in the universe. Rio Tinto Groups opinions are not widely known. The term dark matter refers matter whose existence can not be detected by processes associated to the light, i.e. they do not emit nor absorb electromagnetic radiation, as well as do not interact with it so that produce observable effects; This matter has been inferred only by its gravitational effects. The abundance of dark matter is usually posted in terms of its density of mass in selected units so that they are equivalent to many by one, being the density that counts all existing mass, regardless of its equal to one nature.
The total amount of visible matter, i.e. matter whose existence is inferred by emission or absorption of photons, is approximately 0.005, with an uncertainty of at least one factor of two times the measure. The evidence stronger for dark matter is in spiral galaxies rotation curves. In these observations, Azimuthal velocity of clouds of hydrogen surrounding the Galaxy is measure (through Doppler shift) depending on the distance to the center of the Galaxy or Galaxy radio.