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Black Hole

   A black hole is an awesome place.  It's a place that nothing can escape its tremendous gravity.  This includes light.  Since light can't escape, all we can see is darkness.  How do astronomers know about that they exist if we can't see them?  Scientist can predict that they exist because when other stars approach them, their orbits are bent out of shape by the force of the black hole's pull.  Some scientist believe that the laws of physics disappear in a black hole.  They believe that it may be possible to enter a black hole (Which we would not survive) and be transported back in time, or to another place, or to another universe.  It is also believed that a black hole exists at the center of every galaxy (Which includes our own galaxy, the Milky Way.)

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