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Black holes I know what you are thinking Something black in space that sucks you in and you can never get out Even though that is basically true there is a lot more to it than that Black holes are the mysterious dark regions of the universe A black hole is an area of space made up of extremely dense matter in which everything is pulled in and nothing not even light the fastest thing in the universe can escape The theory that black holes might actually exist became more common after the 1930s when Einstein gave his theory of general relativity with mathematical formulas A man named John Wheeler was the one to come up with the name black hole Before that black holes were called frozen stars because of the supposed image of an object entering a black hole would appear to freeze at the edge even though the object already entered the black hole The theoretical shape of a black hole is spherical like any other sun or planet In all black holes matter collapses into an infinitely dense point called a singularity For example the radius of a black hole with the mass of approximately ten suns would only be thirty kilometers With the radius of a mass equal to 100 million suns would be three million suns Black holes have a gravitational field called an event horizon In this region gravity is so strong that it tugs at space and time slowing down time and stretching out space Not even light can escape the immense force of the gravity here The event horizon is basically the place where there is no turning back Once you are in the gravitational pull of the event horizon you are in the black hole no matter what A black hole has a collection of mass whose gravity is strong that everything that passes the event horizon is pulled in Inside of
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