Explanation : Sir Isaac Newton brought out his monograph, titled 'Philosophiee Naturalis Principia Mathematica,' in 1687. In this work, Newton described universal gravitation and the three laws of motion. He showed that the motions of objects on Earth and of celestial bodies are governed by the same set of natural laws. Newton's law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. ....Read more