The law of universal gravitation Isaac Newton became obsolete when "Albert Einstein" projected the principle of his theory about the distortion of space and time. The mass of a body significantly alters the shape of the environment which it is situated and also happens with time. Those objects that possess a great mass are capable of make that converge towards itself themselves, by the deformation that its weight exerts in the space, of all those elements of lower mass that you orbit and with this is explains the why Newton understood that existed a "force" that called "gravity" that was that them objects tend to be glued to the Center planetary. The question that some physical is pose is... in the inside of a hole black, in which the mass and the time are completely collapsed, would be possible travel in the time...? "Still not is theory clear any that defines the origin of black holes in space, but possibly a future and broader study about them we provide keys to understand how it behaves inside time."
"Theoretical principle of formation of a black hole in which shows the deformation of space and failing time".