Sir Isaac Newton is credited with discovering gravity. His formulation of the law of universal gravitation in the 17th century described how objects attract each other due to their mass. Newton's famous observation of an apple falling from a tree led him to ponder the forces at play, ultimately resulting in his groundbreaking work, *Principia Mathematica*. In this work, he explained that the force of gravity not only affects objects on Earth but also governs celestial bodies, providing a comprehensive framework that revolutionized the understanding of physics and astronomy.