Chapter 423

A law of interaction between bodies, discovered by Newton in 1687. , There is mutual attraction between any objects, the magnitude of this force is proportional to the mass of each object, and inversely proportional to the square of the distance between them.

The law of universal gravitation was first proposed by Newton in his 1687 book, Mathematical Principles of Natural Philosophy. Using the law of universal gravitation, Newton not only explained the law of planetary motion, but also pointed out that the satellites of Jupiter and Saturn also have the same law of motion around the planet. He believes that the moon is not only gravitational by the earth, but also by the gravitational force of the sun, thus explaining the double average difference and business trips that have been found in the moon's movement. In addition, he explained the orbits of comets and the phenomena of tides on Earth. Neptune was successfully predicted and discovered according to the law of universal gravitation. After the law of universal gravitation appeared, the study of the motion of celestial bodies was officially established on the basis of mechanical theory, thus creating celestial mechanics. To put it simply, the greater the mass of things, the greater the gravitational force, and the gravitational force generated by the mass of the earth is enough to hold all the things on the earth.

Any two particles attract each other through the force in the direction of the line connecting the centers. The magnitude of the gravitational force is directly proportional to their mass product, inversely proportional to the square of their distance, and has nothing to do with the chemical essence or physical state of the two objects and the intermediary substance.

In classical physics, gravity is considered to be one of the fundamental forces in the universe, proportional to mass and inversely proportional to the square of distance. But in Einstein's theory, gravity is no longer a fundamental force, but only a manifestation of the bending of the space-time structure. The reason for the bending of the space-time structure is the huge mass.

According to the theory of general relativity, the space-time around the sun is affected by the huge mass of the sun, forming space-time curvature, while the planets move according to their geodesics, which is equivalent to the uniform linear motion in the inertial system.

Every particle in the universe attracts every other particle with a force. This force is proportional to the product of the masses of the particles and inversely proportional to the square of the distance between them.

Specific to cosmic celestial bodies under extreme conditions such as black holes. It has a strong attraction, and when scientists explain this attraction, it is attributed to the curvature of space. What causes the curvature of space is the enormous mass of the black hole itself.

Quantum mechanics holds that gravity is caused by the exchange of gravitons between two particles.

Early on, people were able to distinguish many forces, such as friction, gravity, air resistance, electricity, and human power. Newton was the first to accurately attribute these seemingly disparate forces to the concept of universal gravitation: an apple falls to the ground, a person has weight, and the moon revolves around the earth, all of which are caused by the same cause.

The reason why light is sucked in by the black hole is that the space is distorted by the gravitational force, and the light enters the black hole along with the distorted space. Everyone knows that the light only travels in a straight line, and the light is not sucked in by the gravitational force, but Light still travels in a straight line, but the space is distorted and enters a black hole. For example, if you draw a line on paper and twist the paper, it is still a line.

Light travels in straight lines, and according to general relativity, space is curved by a gravitational field. At this time, although the light still travels along the shortest distance between any two points, it is no longer a straight line, but a curve. Figuratively speaking, it seems that the light is going to go in a straight line, but the strong gravitational force bends it.

Spirit escapers believe that gravity is the interaction between matter and matter. The gravitational field is the result of this action. And this result is like a spatial property. It is precisely because of this space property that matter has inertia. And the magnitude of this inertia is only related to the mass of the matter. And the size of the mass will determine the size of the gravitational force. This is the reason why gravitational mass and inertial mass are strictly proportional, and it is correct. Einstein was also correct in establishing the equivalence principle with this.

Inertia itself is not a force, it is a property of matter in a gravitational field. Don't make a fuss about gravity and inertial force, and make things difficult for "gravity is the source of inertia."

In different scales and under different particle motion conditions, it shows completely different effects. This is also very logical in philosophy.

In physics, gravitational waves are ripples in the curvature of space-time that propagate outward from a radiation source in the form of waves that transmit energy in the form of gravitational radiation. General relativity predicts the existence of gravitational waves. The existence of gravitational waves is a consequence of the Lorentz invariance of general relativity, since it introduces the concept of finite propagation speeds that introduce interactions. In contrast, gravitational waves cannot exist in Newton's classical theory of gravity, because Newton's classical theory assumes that the interaction propagation of matter is infinite in speed.

Gravity is thought to be an effect of the curvature of space-time. This bending is caused by the presence of mass. In general, the greater the mass contained within a given volume, the greater the resulting curvature of spacetime at the boundaries of that volume. As objects with mass move through spacetime, changes in curvature reflect changes in the objects' positions. Under certain circumstances, an accelerating object can change this curvature and propagate outward in the form of a wave at the speed of light. This propagation phenomenon is called a gravitational wave.

When a gravitational wave passes through an observer, due to the strain effect, the observer will find that the space-time is distorted. When the gravitational wave passes, the distance between the objects will increase and decrease rhythmically, and this frequency corresponds to the frequency of the gravitational wave. The strength of this effect is inversely proportional to the distance between the sources that generate gravitational waves. The orbiting binary neutron star system is predicted to be a very strong source of gravitational waves when they merge, due to the enormous acceleration they experience as they orbit close to each other. Since these sources are usually very far away, the effect is very small when observed from Earth.

Gravitational waves should be able to penetrate places that electromagnetic waves cannot. So it is speculated that gravitational waves can provide observers on the earth with information about black holes and other exotic celestial bodies in the distant universe. And these celestial bodies cannot be observed by traditional methods, such as optical telescopes and radio telescopes, so gravitational wave astronomy will give us a new understanding of the operation of the universe.

Gravity and gravitational waves drive the conversion and operation of energy in the last days, and the source of energy is the huge energy source of the underground world besides natural energy.

The mutual attraction between Agula's heart and the blood pool is changing the future and destiny of the underground world. To be continued.