Isaac Newton observed the fall of an apple in 1666 and deduced that the same force pulling the apple to Earth was the same that kept the moon in orbit. He did not publish his theory until 1687.
Newton was primarily a mathematician, and he used calculations to determine if his prediction was correct. Correspondences with leading scientists of his day led him to calculate the shape of planetary orbits. However, Isaac Newton was a very private man, and he lived almost as a recluse. He did not publish until he was urged and encouraged to by a fellow scientist named Edmond Halley, who was impressed by Newton's mathematical insights.
Learn MoreIsaac Newton's theory of gravity states that every particle in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. The law is represented as: F=G (m1m2)/R.
Full Answer >Sir Isaac Newton published his theory of gravitation in 1687 in a book known as the "Principia." Newton built upon the discoveries of previous scientists, such as Johannes Kepler and Galileo Galilei, to develop his theory of gravity, also known as the three laws of motion.
Full Answer >Sir Isaac Newton discovered gravity around 1665 while he was drinking tea and observed an apple falling from a tree. Newton deduced that the force that caused the apple to fall to the ground also is the same force that causes the moon to orbit the earth.
Full Answer >Although never fully substantiated, a legend exists that explains how Sir Isaac Newton discovered gravity after watching an apple fall from a tree. There is some evidence though that this incident did in fact occur. William Stukeley, who was a colleague of Newton, and his assistant John Conduitt both wrote about the event taking place in manuscripts.
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