![]() As matter and light approach the vicinity of a black hole they are slowly drawn in. If you have ever watched water swirling down a drain, then you have a pretty good idea what happens as a black hole pulls things in. The gravity becomes so intense that not even light can escape it. It is theorized that when a star roughly ten times the size of our Sun nears the end of its life, it shrinks as its own gravity slowly pulls it in, but as it becomes more and more dense the gravity becomes stronger. When the outward pressure from the heat is nearly gone, the inward pressure of gravity still remains and is determined by the size of the star. ![]() When a star nears the end of its life it cools off slowly and the outwards pressure grows weaker and weaker as the temperature of the star drops. This is the same principle at work when a star is burning its heat is generating great outward pressure but this constant explosion is matched by gravity that is equally strong, thus a star maintains its shape and size. If you were to throw an unopened can of soda into a fire, the beverage would expand from the heat and explode. Inside a star there is a constant battle between inward pressure from gravity and outward pressure from heat. A black hole is an (almost invisible) body in space, created most likely from a collapsed red super giant star, that is so dense that neither light nor matter can escape its gravitational pull.
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