Late 1500s: Galileo Galilei, known as the "Father of Science", was an Italian astronomer, physicist, mathematician, inventor, and philosopher and was responsible for the discovery that heavy objects do not fall. to the ground faster than lighter objects. Galileo determined that “the acceleration of a falling body, the parabolic trajectory of a projectile, and the resistance of solids to fracture” (Swerdlow, 2011).3. 1687: Sir Isaac Newton publishes his book Philosophiæ Naturalis Principia Mathematica, often known by the simpler title Principa. Principia included details on his law of motion as well as Newton's law of universal gravitation. Sir Newton took Galileo's theory that objects are attracted to the center of the Earth and expanded the concept, showing that the same gravitational force results in the orbit of the planets in the solar system. “He used the Latin word gravitas (weight) to designate the force that would become gravity and defined the law of universal gravitation” (New World Encyclopedia,