![]() In 1687, Newton published PhilosophiƦ Naturalis Principia Mathematica, a book that theorizes every object in the universe - from a grain of sand to the largest stars - is being pulled on every other object.It took real insight from Isaac Newton to develop gravity from a normal occurence of objects falling to a measurable and predictable phenomenon. ![]() Johannes Kepler also proved gravity with his elliptical orbit law, stating that planets orbit the sun in elliptical orbits with the sun at one focus.He showed that gravitation accelerates all objects at the same rate regardless of weight. In the late 16th century, Galileo dropped balls from the Tower of Pisa.The Ancient Greek and Indian philosophers already observed that objects naturally fall toward the ground.Key Facts & Information DISCOVERY OF GRAVITY See the fact file below for more information on the gravity or alternatively, you can download our 24-page Gravity worksheet pack to utilise within the classroom or home environment. The force of gravity keeps all of the planets in orbit around the sun. Gravity is the force by which a planet or other body draws objects toward its center. Download the Gravity Facts & Worksheets.
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