Themes > Science > Astronomy > The Universe > The Development of Modern Astronomy > Sir Isaac Newton and the Unification of Physics & Astronomy
..Sir Isaac Newton &  the Unification of Physics	..The Universal Law of Gravitation
..Vectors: Velocities, Accelerations, and Forces	..Newtonian Gravitation & the Laws of Kepler
..Newton's Three Laws of Motion	..Gravitational Perturbations and the Prediction ...