The story of Newton being hit on the head by an apple

Newton was sitting under an apple tree, and the apple hit his head. Newton was inspired to discover the law of universal gravitation. This is a story that all children of several years old know. Almost everyone describes Newton's discovery of the law of universal gravitation in this way.

However, according to a report in Hong Kong Ta Kung Pao on the 20th, according to a manuscript recently published by the Royal Society, the bridge that Newton was hit by an apple seems to be a legend invented by later generations.

Extended data:

Newton didn't find gravity. He found that gravity is "everything". Every object attracts other objects, and the magnitude of this attraction is only related to the mass of the objects and the distance between them. Newton's law of universal gravitation shows that every object will attract every other object, and the gravitation between two objects is directly proportional to their mass, and the mass will decrease with the square of the center distance between two objects.

Newton developed calculus in order to prove that only a sphere can concentrate the total mass of the ball on the center of mass of the ball to represent the total effect of gravity of the whole ball. However, no matter how far away from the earth, the gravity of the earth will never become zero. Even if you are taken to the edge of the universe, the gravity of the earth will still act on you. Although the influence of the earth's gravity may be masked by the massive objects near you, it still exists. No matter how small or far away, every object will be affected by gravity and spread all over the space, just like what we call "everything"