Black Holes 3
The theory that black holes have existed is not new at all. The thought of them first started in 1783 when Rev. John Michell applied Newton's theory of gravity to predict the possibility of so-called "dark stars." Albert Einstein's theory of relativity predicted in 1915 "Schwartzschild singularities." In 1967, these were renamed "black holes."
A black hole is collapsed object (usually a star) that has become invisible and has such a powerful gravitational force that nothing, even light, can escape its surface. This is the reason that they are invisible. They are so powerful that one could easily crush an enormous amount of matter into an incredibly small space. For instance, if the earth were to be squeezed into a black hole, it would end up as the size of a marble.
A black hole forms when a super massive star has "used up" all of its nuclear fuel and then collapses under its own gravitational force. This happens because, as a star burns fuel, it creates an outward......
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