What s going on with black holes?

First of all, light is also a kind of matter, and even time can bend or change speed or change direction, of course, light is a collection of energy block photons, photons move at the speed of light to have mass, in the face of the extreme density of black holes, the strong gravitational force can absorb it.

As for black holes, which are a type of antimatter, know electrons?Electrons are negatively charged, then positrons are antimatter, protons are positively charged, then negatively charged protons are antimatter. A black hole is a star in which the positive (constant) matter is infinitely concentrated until it finally collapses into a black hole (extremely dense).

In popular understanding, the positive and antimatter meet the two phases of nature to cancel out, which side has a surplus, which side continues to exist, isn't it?Hehe.

Black holes are invisible because even light can be absorbed, so no light enters our eyes, our naked eyes cannot see them, and it is precisely because they absorb light that they are called what they are"Black holes"!

Black holes are very dense stars. Generally speaking, the denser the star, the greater its escape velocity, and when the density of a black hole is extremely high, the escape velocity can exceed the speed of light, so even light cannot escape.

Escape velocity is the minimum velocity at which an object can escape the gravitational constraints of the star in which it is located.

There is a law of gravitation, and if there is a large mass, the gravitational force will be great.

Black holesTo talk about black holes is to talk about black holes without a general understanding of the nature of the gravitational field.

If we talk about black holes according to the definition of black holes, then black holes in the universe do not exist.

Because matter in the universe has the essential properties of matter.

According to the nature of matter in the universe, it is impossible for the light emitted by stars to be absorbed back into the star by the star.

A black hole is a very small, massive star, and under its strong gravitational pull, even light cannot escape——— and the light emitted from the surface of the star is attracted back to the star by the star's own gravity before it reaches the distance.

Light has wave-particle duality, and people are made of particles, because the gravitational pull of black holes is very large, it will destroy the body's own gravitational field, turning people into n particles, so light will also.

According to modern scientific theory, when a certain mass of celestial matter is highly concentrated into a small volume, and when it reaches a certain level, the gravitational field will highly bend the space around the celestial body and wrap itself, and the radiation it produces will not be able to come out. Such a celestial body is called a black hole.

Scientists used Einstein's general theory of relativity to predict a celestial body called a "black hole".

The gravitational pull of the sun will also increase, absorbing other celestial bodies throughout the solar system. And as the mass of the Sun increases, its gravitational pull increases, causing the Sun to slowly form the so-called black hole prototype. So when you understand how black holes are formed, you will understand that the earth will not become a black hole in any way, because before it becomes a black hole, it is swallowed by the sun.

The gravitational pull of a black hole is so strong that no matter can escape its gravitational pull, including the fastest light in the universe, and the black hole sucks all the light into it, making the black hole not very easy to find, but the existence of the black hole is still detected by humans.

At the end of the 17th century, Mitchell of England and Laplace of France concluded based on Newtonian mechanics that when the escape speed of the surface of a celestial body is equal to the speed of light, the celestial body will be invisible, such a conclusion is the initial conjecture of the existence of black holes.

At the end of 1915, Carl Schwarzschild of Germany applied the equations of general relativity to calculate the space-time properties around a point gravitational source. Schwarzschild concluded that as the distance from the point gravitational source decreases, the geometry of space-time becomes singular. At the distance r 2 gm c 2 (m is the central mass, g is Newton's gravitational constant, and c is the speed of light), both space and time lose their properties, time tends to infinity (which can be understood as time stagnates), and space bends to itself, that is, the gravitational pull is so strong that light cannot escape.

And this is exactly what happens when Mitchell and Laplace, based on Newtonian mechanics, calculated that the surface escape velocity of a celestial body is equal to the speed of light.

This distance is 3 kilometers for the mass of the Sun and 3 million kilometers for 1 million times the mass of the Sun. For the earth it is 1 centimeter. At this distance, all celestial bodies are black and invisible.

A black hole is the remnant of a massive star at the end of its evolution. When a star with a mass greater than 10 times the mass of the Sun evolves to the red giant stage, due to the exhaustion of nuclear fuel, the core shrinks, and a supernova explosion occurs through the "core cataclysm", which explodes the shell and shrinks the core, reaching the Schwarzschild radius and becoming a black hole. Around it, the geometry of space-time changes, and space-time shrinks sharply, becoming a gravitational deep well in space.

But a certain distance beyond its periphery, the planetime remains the same, and nothing will change.

In 1920, Anderson of England applied Schwarzschild results to calculate the space-time geometry of the solar system when the sun became a black hole, and he came to the conclusion that "if the sun continues to shrink, one day it will disappear into darkness, not because it no longer emits light, but because it and the gravitational field become impenetrable to light." Since then, more people have made many calculations about how the solar system would be if the sun became a black hole, and the results were the same: if the sun were replaced by a black hole with a mass comparable to the sun, the solar system would not change except for darkness, and the planets would still operate normally around the black hole.

The black hole is still a star, but due to the strong gravitational pull, the light emitted by itself cannot be separated, and all the matter and radiation entering the outside world also completely fall into it, as if it is a bottomless pit in the universe, so it is called a black hole.

According to calculations, without creating a stellar black hole, the mass of the original star cannot be less than 10 times the mass of the sun, and the mass of the black hole formed from it is 3 times the mass of the sun. That is, after the formation of a black hole, its mass becomes smaller, and the gravitational force of course also decreases, and it is only because its mass is too concentrated that a strong gravitational field is formed around it. In Schwarzschild's terms, r becomes smaller, the mass is more concentrated, the gravitational force is more concentrated, and that's it.

When the core of a massive star is exhausted (supernova explosion), the core of the star, which is three times more massive than the Sun, evolves into a black hole (if a neutron star has a companion star and the neutron star absorbs enough material from the companion star, it can also evolve into a black hole). In a black hole, there is no outward force that can maintain balance with gravity, so the core will continue to collapse, forming a black hole.

When matter falls into the realm of things, even if it is calculated at the speed of light, it can no longer come out.

Albert Einstein geometrically interpreted a black hole as a hole in which matter travels through space, and if space itself were a hole, there would be no matter to escape.

There are four types of black holes:

Stellar-evolved black holes, primordial black holes, heavyweight black holes, and middleweight black holes in research.

There are many theories of black holes. Let's take a stellar black hole to illustrate it.

According to the law of gravitation, an object with mass has a gravitational pull, and gravity is able to attract other objects. The greater the mass, the stronger the gravitational pull. For an object to break away from the gravitational pull of a massive object, it must have sufficient velocity.

When we launch artificial satellites, the satellites must reach a speed of kilometers and seconds in order to overcome the earth's gravity and become satellites orbiting the earth.

To launch an interstellar probe, the speed must reach kilometers and seconds before the probe can break away from the Earth and leave the Earth. This velocity is called the "second cosmic velocity", also known as the "detachment velocity". Each planet has its own speed of disengagement.

According to the law of gravitation, gravitational force is directly proportional to the mass of an object and inversely proportional to the distance between objects (the radius of the object).

Black holes are also celestial bodies in nature, and they are the last stages of the evolution of massive stars, and the mass of stars is extremely compressed during supernova explosions. After the stellar nucleus is extremely compressed, the material equivalent to several solar masses is concentrated in a volume of extremely small radius, giving it a great detachment velocity. If this speed is greater than the speed of light, then even the light will be attracted by it and cannot escape, and once the outside objects and light enter its gravitational range, they cannot escape its gravitational attraction and can only fall into it.

At this time, the celestial body neither emits light nor reflects light, it is black and cannot be seen. It's a black hole.

This is the Newtonian interpretation of black holes. There is also a relativistic explanation of black holes (Einstein's interpretation), but the Newtonian interpretation is a little easier to understand.

Gravitational space-time in and around black holes.

Anything about black holes is just imagination. Part of the imagination is "verified" by some kind of experimental data, and this part of the imagination becomes a theory. No one knows what a black hole is like, because it's not just visually forbidden, it's cognitively forbidden.

Any so-called common sense about black holes is deduced from the peripheral phenomena of black holes. So you can't get real answers to your questions, and you're just a sci-fi fantasy.

A black hole, black, indicates that it does not emit or reflect any light electromagnetic waves to the outside world. The cave is anything that once it enters its borders, it will not want to slip out again.

Black holes were first calculated by German mathematician Carl Schwarzschild, in the black hole around anything whether it is signal, light or matter can not escape, space-time here has become a bottomless pit, such a place that cannot be seen, touched or detected is called a black hole.

Scientists used Einstein's general theory of relativity to predict a celestial body called a "black hole".

In the world, a black hole is not a hole, nor is it black, and the matter absorbed into the black hole is not absolutely impossible to return to the outside world, and the black hole is definitely not black.