It is a fact that black holes are in the universe. Some people do not believe that they are real. Other myths have also aroused. Some of the more popular myths concerning black holes, came from Hollywood. Television and movies have portrayed them as time-traveling tunnels to another dimension, cosmic vacuum cleaners sucking up everything in sight, and many other false pictures.
Black holes are really just the final step of the life cycle of a massive star.
But even with this simple explanation, black holes still confuse astronomers and are mysterious in certain ways. If a star that massive or larger undergoes a supernova explosion, it may leave behind a large burned out stellar remain. With no other forces to oppose gravity, the remains will collapse in on itself. These remains can form a white dwarf, neutron star or a black hole. A white dwarf stops shrinking when it is around the size of earth.