Principia Mathematica, written by Sir Isaac Newton, is one of the most powerful and groundbreaking scientific works in human history. First published in 1687, this revolutionary book laid the foundations of classical physics and established the basis for modern scientific thought. The importance of Principia Mathematica lies in its ability to unite and explain the fundamental forces that govern the motion of bodies in the universe. In this work, Newton proposed three laws of motion, now known as Newton's laws, and thus created a rigorous mathematical theory to describe and predict the behavior of both resting and moving bodies. The main achievement of Newton in Principia Mathematica was the formulation of the law of universal gravitation. This law states that all bodies in the universe attract each other with a force proportional to their masses and inversely proportional to the square of the distance between them. This mathematical formula provided an explanation for gravitational phenomena, such as the motion of planets around the Sun, and laid the foundations for understanding celestial mechanics.