What did Newton create to prove his idea of gravity?

Newton created the mathematical model of universal gravitation to prove his idea of gravity. He published his work, known as the Principia Mathematica, in 1687. This groundbreaking book described the fundamental laws of motion and introduced the concept of gravitational force acting between all objects in the universe. Newton's mathematical model successfully explained the motion of celestial bodies, such as the moon and planets, and provided a solid foundation for understanding gravity.