Black Hole
A region of space where the density is so great that the speed of light is not sufficient to escape, hence nothing can escape a black hole.. A Black Hole Is A Theoretical Phonomenon That Occurs When Enough Mass Inhabits A Specific Part Of Space Time That It's Gravitational Force Becomes Strong Enough To Trap Light Itself and Any Other Matter.. General theory of relativity says that curvature around any massive object in 4D is proportional to its mass energy. The point in space-time where this curvature is ideally infinite is called Black hole..