Isaac Newton’s scientific contributions

... The study of gravity began in 1687 when Sir Isaac Newton published his Principia [8], where law of universal gravitation was stated, in this conception, gravity is a force acting at distance [1], [20], it predicted a scalar potential field that describes the motion of any test particle in the universe; after, in 1916, Albert Einstein published his general theory of relativity; where the gravity is stated as a consequence of the geometry of spacetime, Einstein set the Newton's theory as a linear approximation of the Einstein field equation; and the geometry of spacetime is described as a manifold R {3,1} ; in 1964, Roy Kerr found a solution that predicted the existence of rotating black holes, these solutions correctly describe the spacetime geometry, however, their mathematical structure impedes to obtain analytical solutions. ...

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Geodesic trajectories for binary systems of supermassive black holes (SMB)