Explanation: Isaac Newton, one of the greatest geniuses of science of all time, according to the legend, revealed the existing force of gravity when apple fell on his head. He is known for his law of motion, as a theory of gravity that does not only work on earth but also in cosmos. He discovered that the force of gravity together with the force of inertia affects the movement of celestial bodies, and the movement of planets around the sun on exactly defined paths. Apart from physics, he also dealt with astronomy, mathematics and theology.
