Will cosmic black holes disappear? Under what circumstances do cosmic black holes appear?

It will disappear, the universe will disappear, including black holes, most of which are created after the death of stars.

Under normal circumstances, cosmic black holes do not disappear; Generally speaking, cosmic black holes only appear after the death of many stars, that is, in the universe, as long as there are relative stars, it will appear.

Black holes disappear, they evaporate until they disappear eventually; A black hole is a gravitational celestial body that will exist as long as the universe exists, and it will continue to expand itself by devouring everything.

After the birth of a black hole, if there are other stars or matter around it, such as interstellar dust, it will accretion and grow, but the speed is relatively limited, because in the process of material dripping of the black hole, there will be electromagnetic radiation due to the compression of all bands, and if there is too much matter, the Eddington limit effect will be formed, that is, the light radiation can reduce the accretion rate, thus tending to equilibrium. Black hole merger is a shortcut, but it is not a small black hole that can be merged, the merger process of supermassive black holes and even galaxies is also carried out at the same time, and the central black hole may also merge after the merger of the Milky Way and the Andromeda galaxy in the future.

Through the Doppler shift effect, we observe that the universe is expanding endlessly, and we know that there are extremely powerful objects in the universe, which are black holes. The gravitational pull is so infinite that not even the speed of light can escape its pull. And anything that comes close to a black hole will be torn to shreds.

It is commonly said that when a massive star becomes a supernova, the inner core collapses under its own gravity. The black hole forms a death star. What is already dead will experience death again, and we won't know much about this until Stephen Hawking presents his theory of black hole radiation.

Black holes gradually lose mass through quantum mechanical processes. Something that seems to live forever in the universe is slowly but steadily moving towards its eventual demise, just like everything else. So, black holes do die.

But how long? Well, it almost entirely depends on how massive the black hole is. The smaller the mass of a black hole, the hotter it gets, the faster it loses energy, and the faster it disappears.

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These devoured planets should all go to other multiverses. This is derived from the "superstring theory". As we all know, black holes can be said to be the largest and most massive of all kinds of celestial bodies discovered by mankind so far, and they are also the most "terrifying" ones.

It can be said that no celestial body has the terrifying deterrence and destructive power of a black hole attack; Within the light-year-long Schwarzschild radius of a black hole, all matter that passes by is captured by its gravitational pull and becomes a meal on the black hole's plate. Therefore, the black hole is like a "cosmic scavenger", eating all the time and endlessly, even if it is a neutron star, the photon cannot escape his clutches. So, where did the planets and matter devoured by the black hole go in the end?

There are generally two ways of saying it in academia. Mr. Stephen Hawking, the great physicist of this century, believes that after a black hole "eats" matter, it will gradually digest it and then "excrete" it like humans. The reason why the black hole photographed by NASA has a very high accretion disk is so bright that it closes the cluster because it is constantly releasing energy outward; This energy is named "Hawking Radiation".

It can be said that Hawking's interpretation of this issue is still from a more traditional point of view, and is not too radical; In fact, similar views have appeared as early as the thirties of the last century, and the American physicist Schwarzschild also thinks so. However, in 2018, Wayne, a professor in the Department of Astronomy at the University of London, proposed a completely new interpretation. He is a strong proponent of the "superstring theory" and feels that there is a visible "wormhole" in the center of the accretion disk of black holes; A black hole is actually a deformed celestial body that exists for wormholes.

A wormhole is a bridge connecting one dimension to another, because it breaks the space-time equilibrium in three-dimensional space, so the black hole will have a huge gravitational pull; After being swallowed by the black hole, the celestial bodies have passed through the "wormhole" and traveled to other multiverses.

The explanation given by scientists to Qi Yan is that after these problems are swallowed by black holes, they will not disappear out of thin air at all, but they have all shifted in another time and space, and these have always been the key points that are difficult for human science and technology to break through, which is still a very important research direction for scientists. As early as before, some scientists proposed that the black hole in the universe is the connection point of imitation of the time and space, and there are many different situations in it.

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.

The creation of black holes is similar to that of neutron stars; The core of the star rapidly contracts and collapses under the force of its own gravity, resulting in a strong **. When all the matter in the core turns into neutrons, the contraction process immediately stops, and it is compressed into a dense star, which also compresses the space and time inside. But in the case of a black hole [3], because the mass of the star's core is so large that the contraction process goes on endlessly, the neutrons themselves are crushed into powder by the attraction of the squeezing gravity itself, leaving behind a matter of unimaginably high density.

The power that arises due to the high quality, makes:

Any object that comes close to a black hole will be sucked into it by it. The black hole begins to devour the outer shell of the star, but the black hole cannot swallow so much matter, the black hole releases a portion of the matter, shooting out two pure rays of pure energy - gamma rays.

It can also be simply understood: usually the star originally contains only hydrogen, and the hydrogen atoms inside the star collide with each other all the time and fuse. Due to the massive mass of stars, the energy produced by fusion competes with the gravitational pull of the stars to maintain the stability of the star structure.

As a result of fusion, the internal structure of the hydrogen atom eventually changes, ruptures and forms a new element, helium. Then, the helium atoms also participate in fusion, changing the structure and forming lithium. By analogy, according to the order of the periodic table, beryllium elements, boron elements, carbon elements, nitrogen elements, etc. will be produced in turn.

Until iron is generated, the star will collapse. This is due to the fact that iron is quite stable and cannot participate in fusion, and iron is present inside the star, which causes the star to not have enough energy to compete with the gravitational pull of the massive star, which causes the star to collapse and eventually form a black hole. To say that it is "black" means that it is like a bottomless pit in the universe, once any matter falls into it, it can no longer escape.

Like white dwarfs and neutron stars, black holes may have evolved from stars that are several times more massive than the Sun.

When a star ages, its thermonuclear reaction has exhausted the fuel (hydrogen) of the center, and there is not much energy produced by the center. In this way, it no longer has enough strength to carry the enormous weight of the shell. So under the weight of the shell, the core begins to collapse, and matter will march inexorably towards the central point, until finally a star with a near-infinitesimal volume and almost infinite density will be formed.

And when its radius shrinks to a certain point (it must be smaller than the Schwarzschild radius), the mass-induced distortion of space-time makes it impossible for even light to shine outward—and the "black hole" is born.

Black holes are the product of extremely massive stars**, located far from Earth, and there are no black holes near the solar system.

Because superstars emerge later, black holes are far away from Earth.

It is left behind due to the large ** of the star.

Take a look at Stephen Hawking's A Brief History of the Universe.

Black holes are one of the most curious objects for every astronomy enthusiast, but no one knows why there is such a terrible thing as black holes in the universe, but we do know that they do, and they are everywhere in the universe, the nearest black hole is 16,000 light-years away (it seems), and there is the largest supermassive black hole in the whole galaxy in the center of the Milky Way! As for the birth ...... black holesTo put it simply, the birth of a black hole comes from the death of a supermassive star, that is, a supermassive star is the same as an ordinary star, it is a nuclear fusion reactor, and the energy release of the star and its own strong gravitational force have been in balance for billions of years, when the star energy is exhausted, the released force is weakened, the stalemate is over, gravity wins, the core of the star will be completely squeezed, and when a core as big as two suns is squeezed to the size of a point, a small black hole is born, So it began to eat the rest of the star, but it ate too fast, swallowed, coughed, and shot two giant beams at the poles of the star, and then, the star** became a polar supernova (not all massive stars** are polar supernovae, only supermassive stars do, and only polar supernovae** create black holes)! The energy produced by the polar supernova in an instant is hundreds of times greater than that produced by the sun in its lifetime!

When the energy is gone...All that's left are nascent black holes, and two beams of energy that travel through the universe at the speed of light: gamma rays. Gamma rays are the strongest known energy beams in the universe, and just one such beam can vaporize the entire Earth through the solar system!

In the long history of the earth, there have been experiences of gamma rays brushing shoulders with the solar system! Exterminate 90% of all living things on Earth! It was the first mass extinction in the history of the earth (one of the first mass extinction theories)!

Black holes are like the end of gravity, the end of all things, the end of the universe, and the end of time. A black hole is black because it doesn't emit light or reflect light (everything that comes close to it is sucked in, and light is no exception!). Its actual size is much smaller than what can be seen with the naked eye!

Black Hole is not only a big stomach, he is also very heavy! To know how close a black hole is, think about the Earth in your mind, and now start squeezing it, compressing it, until it is so tight that even the atoms are squeezed out, and then the Earth is as big as a golf ball, but it has the same gravity as the Earth, and it is as heavy as the Earth! There are still many mysteries in the black hole that have not yet been solved!

The above is all written by me since I was a child and I have learned from watching the discovery channel, and I have not copied any information, if there is any mistake, please point out!

All matter motion in the universe follows Einstein's theory of general relativity. Newton's laws of motion are elementary exceptions to the theory of relativity. The theory of relativity holds that antimatter exists in all matter.

Annihilation occurs when positive and antimatter collide. Black holes form from massive stars. When a star reaches old age and the number of hydrogen nuclei inside itself is not enough to support a nuclear fusion reaction, then the helium nucleus is used to carry out the nuclear fusion reaction.

Four helium nuclei undergo fusion to form a carbon nucleus. Further, when the number of helium nuclei is also depleted, the nuclear fusion reaction is changed to the fusion of four carbon atoms to form an iron nucleus. In this process of constant fusion, the volume of the star continues to expand, and finally the large ** occurs.

After that, the star's shell is thrown into space. At this time, the nuclear structure inside the star begins to contract. The distance between atoms is shrinking, and the density of stars is increasing.

The gravitational force increases as the distance between matter decreases. Because there is also a repulsive effect between substances. When the distance is small enough to be gravitational greater than the repulsive force, the star will collapse.

In other words, the star is crushed by its own weight. After that, the star will continue to absorb the material around it, making itself heavier and heavier. According to Newton's law of universal gravitation, the greater the mass of an object, the greater the gravitational pull on other objects.

Then, the gravitational force causes the mass to increase, and the increasing mass causes the gravitational force to increase. Eventually, it develops into something that is drawn to it.

According to the general theory of relativity, light has wave-particle duality. That is, light is both a wave and a particle. Massive stars themselves also emit light. As the mass increases, the light particles that emit themselves will eventually be attracted and unable to come out. This is a black hole.