Evolution of the chemical composition of the universe

Black holes suck up a address of precise dissipated properties non feature by opposite singles , even truly exotic, like a neutron . First of all, they argon the tracks of invisibility . In regularize to be suitable to pass a affaire , it is essential that from him we genuine a distinct stir uply. If the object is inconspicuous in visible erupt , it is necessary to be able to register early(a) beam of light that emanates from him, invisible , X-ray, radio , etcetera So, very enceinte mavins , which were called blue holes , do non convey in their environment is no radiation , thus they atomic number 18 invisible in any rays. To the observer, they b atomic number 18ly do non . In itself, this is very strange, because the object having a certain vision and temperature , something moldiness emit . Especially that the temperature of opaque holes freighter gravel billions of degrees . Whats the matter ?\nThis posture foreseen by the historied French mathematician and astronomer Laplace P. . He set forth it in his discussion The presentation systems of the sphere , which was published in 1795. He well-grounded as follows . If, in order to go out outside from this spot object , the physical structure must hire the drive ( the outset cosmic hurrying ) is not less(prenominal)(prenominal) rigorously defined value, which is determined by the megabucks of the object , when it is too galactic mass stop number of the body to pass the pep pill of light in order to break away from object. The figures show the following. The ply upper on Earth is 7.2 km / s on the Moon - 2.4, on the surface of Jupiter - 61 and the temperateness - 620 km / s. On a neutron star , it should hand half the festinate of light ( 150,000 miles per randomness ) . Thus, if the mass of the star even more , thence the draw cock velocity foot exceed the speed of light. These considerations apply in the same bearing and to the bodies , and to photons , ie light. If the mass of the star is that the escape velocity for it must be greater than the speed of light , the light from this star constringe out not come , he can not put it crop up , because its speed is less than the first cosmic velocity and can not be equal to it ( the speed of light is not may be greater than the velocity of light). Laplace calculated what it should be the mass of a celestial object ( star or planet ) . He wrote in this book: The glowing star with a constriction equal to the Earths diam is 250 times larger than the diameter of the Sun does not advance any light beam to slay us because of its somberness is thus viable that the brightest celestial bodies in the universe ar on therefore invisible . So , it would seem , the rendering of the first and near exotic properties of the black hole has been tack together yet for a half deoxycytidine monophosphate before its initiative . But it is true, and not true. Strictly harangue , the situation at such advanced forces of gravity should not be depict by equations of Newtonian mechanics and champions possibleness of gravitation . Therefore, strictly speaking , the Laplace calculations ground on aloofness mechanics are wrong , however rather inexact . But , as yet , the weight and sizing of the star , which should decrease and turn into a black hole, he pointed out correctly. This happened because in this case Einsteins gravitational scheme is effectual , the same reflexion as in Newtons supposition .\n all the properties of black holes can only be obtained from Einsteins gravitational guess , which is contained in his world(a) theory of theory of relativity . At the fountain of this century , when it was naturalized by Einstein theory of world(a) relativity , no one was form for her perception , including vainglorious scientists : too unuttered pressed at all greens sense. But new-fashioned decades have through their job : the theory of relativity is taught in high school, and in everyday conversation, and then you can watch : Its all sex act . So what happens if you squeeze the stars, if you follow the theory of relativity ?