We all are aware of the legend of how Newton identified gravity and its law. One day while sitting under the tree an apple fell on his head. Irrespective of the truth of this story, the apple is a significant part of his story as it made him aware of the ‘law of forces’ that can describe the motion of an apple just as it explains the motion of the moon.

This law helps in making precise predictions of our solar systems’ motion. Gravitation law describes the attraction of the gravitational force between two forms of the masses and the distance amid them. In addition, the most significant feature of Newton’s law is the claim that the gravitation works universally, and any two forms present anywhere in universe can attract one another.

This belief made it probable to make predictions of the movements of our solar system in the future with incredible precision. For example, the movement of our moon after getting influenced by the earth and the sun.

This law by Newton is often applicable to the designs of the orbit for any missions in space. In current times, the space agencies like ESA and NASA make use of this law to work on the spacecraft trajectories. It all began with an easy question i.e., what is the most effective route to moon from earth?

In the missions of the Apollo in 1960-70s, the routes were presumed on the basis of this law by evaluating force which allow the moon and earth to act upon spaceship.

Moreover, since this law allows to evaluate the trajectories for the artificial satellites, it also makes satellite television, communication, Mars rovers ad GPS and even interplanetary probes conceivable.