The force of gravity is described by Newton's Law of Universal Gravitation. This principle states that every point mass attracts another 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 their centers. In simpler terms, gravity pulls objects toward each other, with the strength of the pull influenced by the mass of the objects and the distance separating them. This fundamental force explains why objects fall to Earth and governs the motion of celestial bodies, influencing everything from falling apples to the orbits of planets.