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Gravitational Forces refer to the natural phenomenon by which objects with mass are attracted to one another. This force is responsible for holding planets in orbit around stars, moons around planets, and objects on Earth's surface. It is described by Isaac Newton's law of universal gravitation, which states that the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. Gravitational forces play a crucial role in the formation and evolution of celestial bodies and are fundamental to our understanding of the universe.