Here's why:

* Law of Universal Gravitation: Newton formulated the law of universal gravitation, which describes the force of attraction between any two objects with mass. This groundbreaking discovery explained why objects fall to the Earth and how the planets orbit the Sun.

* Laws of Motion: Newton also developed the three laws of motion, which describe how objects move in response to forces. These laws form the foundation of classical mechanics and are still used today to understand and predict the motion of objects.

While other scientists have made significant contributions to our understanding of gravity and motion, Newton's work is considered foundational and revolutionary.