Universal Law Of Gravitation
There is a popular story that Newton was sitting under an apple tree, an apple fell on his head, and he suddenly thought of the Universal Law of Gravitation. As in all such legends, this is almost certainly not true in its details, but the story contains elements of what actually happened.
Newton’s Law is called the Universal Law of Gravitation because it applies to every single object in the universe. All objects have a force of gravity acting on them no matter how slight and the force of gravity on each object follows Newton’s formula.