Gravitational force, also known as gravity, is one of the fundamental forces of nature. It is the force of attraction that exists between any two objects with mass. Gravity is responsible for the phenomenon of weight, the motion of planets around the sun, the formation of galaxies, and many other celestial and terrestrial phenomena.

The concept of gravitational force is described by Sir Isaac Newton's law of universal gravitation, which states that the force of attraction between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.