Gravitation

    Scientists had been working on discovering how gravity worked for many years to no avail, so it was a huge day when they learned that Isaac Newton had solved this puzzle! In 1665 Newton realized that the force that holds the moon in its orbit is the same force that makes an apple fall. This contradicted the ancient belief that the motions of earthbound bodies followed different laws than heavenly bodies.
    Newton concluded that every object in the universe attracts every other body. This tendency of objects to move towards each other is called gravitation. Newton’s law of gravitation, written in 1684, says: "every particle attracts any other particle with a gravitational force whose magnitude is given by F = (G) x (m1)(m2) / r2.
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