The Black hole is said to be a physical phenomenon from which nothing can escape, not even light. The event horizon is its borders where everything, also light, is drawn into its gravitation and gravitation field. Physically the Black hole is a concentration of mass. Its exact construction and behavior is for the moment unknown, thus it’s up for novel theories and ideas. Quantum gravity is one such theory, which tries to describe events from Planck scale up till Black holes.
Black holes were first discovered within Einstein’s General Relativity and were for a period of time only a plain theoretical construction. Nowadays the astronomers have detected Black holes by their interaction with surrounding stellar objects.
Normally a Black hole is made of a dying and collapsing star above a specific solar mass. In 1931 Subrahmanyan Chandrasekhar calculated, using general relativity, the limit to 1.4 solar masses for a dying star to become a Black hole. Already in 1939 Robert Oppenheimer and others did adjust the limit to 3 solar masses and indicated that the Chandrasekhar limit of 1.4 solar masses did apply for neutron stars. Later general relativity has refined at which point a dying star converts to a neutron star or a Black hole. Also rotation and electrical charge can be calculated concerning a Black hole originating from a dying sun.
Rotating Black holes has recently been observed and velocities calculated up till the speed of light has been confirmed as the Black hole drags the surrounding space with it.
NASA, has furthermore, a lot of astronomical data indicating a massive Black hole in the centre of our own galaxy, the Milky Way. Also other galaxies indicate a massive Black hole in their centres, sometimes with attached “baby” black holes. Probably each galaxy has a Black hole in their centre. Free lying Black holes observed by NASA and other astronomical institutes indicates also jets of electrons from these Black holes. The assumption of creation of hydrogen concerning these massive Black holes is not far away when the novel solar and planet creation observations are built upon the presence of vast amounts hydrogen gas.
The hypothesis of that a Black hole only consumes energy and mass has been opposed by some theories where the Hawking radiation is one. Where it predicts Black holes created from dying stars to evaporate small amounts of temperature or energy depending on its diameter. Small Black holes should evaporate faster, and larger would also grow due to the feed of the background temperature radiation of 2.7 Kelvin. The Hawking radiation has been searched for but it has up till now not could been verified. On the other hand when massive Black holes has been verified to jet electrons. So, a Black hole maybe is not so black as we at first did believe.
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