Any two objects in nature are attracted to each other, and gravity is directly proportional to the product of their masses and inversely proportional to the square of their distance.

Formula:

The attraction between two objects.

G: constant of universal gravitation

M 1: the mass of the object 1.

M2: mass of object 2

R: the distance between two objects

The laws of the universe? Gravity is the law of gravity that explains the interaction between objects. This law was published by isaac newton in 1687 in Mathematical Principles of Natural Philosophy. The content of this law is that any two particles attract each other through the force in the direction of the connecting line. The magnitude of gravity is directly proportional to their mass product and inversely proportional to the square of their distance, and has nothing to do with the chemical properties or physical states of two objects and intermediate substances.

Legal significance:

The discovery of the law of universal gravitation is one of the greatest achievements of natural science in the17th century. It unifies the laws of motion of ground objects and celestial bodies, and has a far-reaching impact on the future development of physics and astronomy. A basic law of interaction (one of the four major interactions in nature) was explained for the first time, which set a milestone in the history of human understanding of nature.

The law of universal gravitation reveals the laws of celestial motion and is widely used in astronomy and space navigation calculation. It provides a set of calculation methods for practical astronomical observation. With only a small amount of observation data, we can calculate the orbit of celestial bodies for a long time. The discovery of Halley's comet, Neptune and Pluto in the history of science are all examples of great achievements made by applying the law of universal gravitation. Using the formula of universal gravitation and Kepler's third law, we can also calculate the mass of celestial bodies that cannot be directly measured, such as the sun and the earth. Newton also explained the tidal phenomena caused by the gravity of the moon and the sun. According to the law of gravity and other mechanical laws, he also successfully explained the reasons for the flat shape of the earth's poles and the complex motion of the earth's axis. Overthrow the gravity of the gods that ancient humans thought.

It is of great significance to cultural development: it has established people's confidence in understanding everything in the world, liberated people's minds and played a positive role in the history of scientific and cultural development.