This is the story interesting and meaningful about the great scientist Newton. On a fall day, Newton was sitting on the couch in the flower garden to read, suddenly an Apple from the tree fall down "ridiculous", the first hit of a Newton. He rubbed the head, look ripe apples roll down to the depths. Apple has given him a hint do you think hypnosis man. Ripe apples and then fell to the ground, why? Member because the wind blows? Not, vast inventory, why must fall down without the fly up into the sky? So the Earth has something-it? All things on earth are the weight, the threw away ended up falling back to Earth, the weight of all things there must be the result of Earth's gravity? After this Newton outlined: all things on earth are good suction power of the Earth, the moon also bear the suction power of the Earth, and the Earth also bear the suction power of the Moon; The earth good suction power of the Sun, the Sun also bear the suction power of the Earth. In other words is everything in the universe has a mutual gravity, because that kind of gravity this that new moon orbiting the Earth, new Earth orbits the Sun. What apples fall to the ground proved the Earth has Apple attraction, of course, Apple also has the attraction of the Earth, but the Earth's attraction for the Big Apple so apples fall to the ground. If we treat the moon as a giant apples, so the Earth also has the attraction of it, so why is it not fall to the ground? Because the Moon is a large Apple, the suction power of the Earth for it is not enough to make it fall down to Earth, can only do it orbiting the Earth. For the Sun, the Earth is also a giant Apple, it orbits the Sun. In the evening when looking up at the sky to see plenty of the stars are blinking, between them have a mutual attraction. This is the law of "universal gravitation" Newton's famous.
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