Sir Isaac Newton
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Publisher Description
Newton formulated laws of motion and gravitation. These laws are math formulas that explain how objects move when a force acts on them. Newton published his most famous book, "Principia," in 1687 while he was a mathematics professor at Trinity College in Cambridge. In "Principia," Newton explained three basic laws that govern the way objects move. He also described his theory of gravity, the force that causes things to fall down. Newton then used his laws to show that the planets revolve around the suns in orbits that are oval, not round.