Sir Isaac Newton's Principia Mathematica

Isaac Newton’s *Principia Mathematica* (1687) is a foundational work in physics, where he formulated the laws of motion and universal gravitation. It explains how objects move on Earth and in space, showing that gravity is a universal force acting between all masses. Newton’s three laws describe how objects respond to forces, leading to predictable motion. His work unified celestial and terrestrial mechanics, demonstrating that the same set of principles applies everywhere. This revolutionized scientific understanding, laying the groundwork for modern physics and astronomy.