Isaac Newton discovered gravity when an apple fell on his head. He then began to think about how the apple had fallen on his head and thus Newton's three laws of motion were created. Newton's first law of motion is that an object in motion tends to stay in motion; an object at rest tends to remain at rest unless another force acts on it. Newton's second law of motion involves the force formula, which is force=mass*acceleration. Newton's third law of motion says that for every action there is an equal and opposite reaction. Furthermore, Isaac Newton created the three laws of motion. First, Newton's first law of motion is that an object tends to remain in the state it is in unless another force acts on it. This law is also known as the law of inertia. When an object is in motion it would like to continue moving forever, but in reality it stops. It stops due to various reasons such as air, the surface it travels on, gravity and it may hit an obstacle. Therefore, that is why in space any object would continue to move forever because there is nothing to stop it from moving...