How do black holes come about? Heroes?

Black holes are made up of stars.

I hate the two people above the most about copying the answers.

Black holes are "bottomless pits" formed by the death of massive stars, and it cannot be said that it is called collapse.

It's as simple as that.

A star with a mass of more than 20 times that of the Sun is generally still more than twice the mass of the Sun after a supernova explosion. The gravitational pull of this part of the matter is very strong, resulting in a sharp collapse. Although there is also some pressure to resist the collapse inside during the collapse process, in the face of such a strong gravitational force, it is tantamount to a mantis arm blocking the car.

As the collapse intensifies, molecules, atoms, and even nuclei are squeezed out, eventually forming an extremely dense center of gravity.

Massive stars collapse violently when they die, and because of their large mass, they collapse too violently and press the star into a point.

The center of the black hole is supermassive and forms a super-strong gravitational field centered on him Light will be sucked into it.

This pitch black is the origin of the black hole.

To put it simply, they are all formed by the collapse of larger stars in their later years.

There are many things in our lives that we can't access, but that doesn't mean they don't exist. In our distant starry sky, there are many things that we cannot touch, and scientists will bring us all kinds of astronomical knowledge, such as black holes, black holes are very magical phenomena, and black holes give all kinds of mysterious colors. So, how is a black hole formed, roughly speaking, it is the generation of stars at the time of **, and the formation is related to the formation of neutrons.

At the same time, black holes are a group of very dense matter, they are naturally formed in the universe, not artificially intervened, and black holes have a strong attraction, so they are very dangerous. At present, from the perspective of science and technology, our cognition and understanding of black holes is still very small, and I believe that with the continuous development of human science and technology, we will discover more and more secrets of black holes. <

I have to say that there are still many things in our lives that cannot be explained, and this is the goal of our scientific struggle. Although they are not without the goals of each of us, they are closely related to the development of humanity. In the big family of the universe, we will find that the earth is so small, the solar system is so dangerous, and the people on our earth are even smaller.

So the universe is vast, we are only a small part of the universe, when standing in a very high perspective of our life, we will find that our life is actually very short, people face all kinds of difficulties, in fact, from this big point of view, in fact, nothing is a thing, it can be said that people's life is not how long a thing, do not cherish the present, cherish the happy time, cherish the time with the family, Every happy time is precious, we must know how to cherish it. <

A black hole is the gravitational collapse of a star, that is, the formation of **. When the gravitational pull of a star collapses, it forms a singularity, which is massive and dense.

The formation of a black hole is the collision of elements in each star, and in the process of collision, some energy is generated, so these energies form a black hole.

Slowly formed. Because there were no black holes at the beginning of the universe, black holes were formed by the slow convergence of matter after the birth of the universe.

A strong ** is formed, and some neutrons will be gathered and compressed, and the black hole is also like a celestial body.

The creation of a black hole is similar to that of a neutron star: when a star is preparing to perish, the core of a star rapidly shrinks and collapses under the force of its own gravity. 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 black holes, the mass of the star's core is so large that the contraction process goes on endlessly, and even the repulsion between neutrons cannot be stopped. The neutrons themselves are crushed into powder by the attraction of the squeezing gravity itself, leaving behind a material of unimaginably high density. The gravitational pull due to the high quality is such that any object that comes close to it will be sucked into it.

When a star ages, its thermonuclear reaction has depleted the center of fuel, and the energy generated by the center is running out. 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 shoot outward – and the "black hole" is born.

Black holes are created by the gravitational collapse of a massive enough star after it runs out of fuel for a nuclear fusion reaction and dies. The creation of a black hole is similar to that of a neutron star, when a star is ready to perish, its core will quickly contract, collapse, or even become strong under the action of its own gravity.

It is formed by the constant space rotten star in space through ** and death, it may also be naturally formed, and it may be generated with the universe; At present, we have only found two kinds of black holes, and what is inside and behind it has not been well explained in our country.

The reason for the formation of black holes is that the dead stars are slowly formed after the collapse, but the mass of the star is required to be 20 to 30 times the mass of the sun, so that after the collapse, the black hole will be formed.

There are two ways for a star to end its life, one is to become a black hole, and the other is to become a white dwarf. A star like the one with a lot of mass has a very tragic end of life. First it becomes a neutron star, and then it becomes a black hole.

After all the energy of the neutron star is used up, that is, after the last element--- iron is born, the matter in the core is empty, that is, it suddenly disappears, and the inside cannot withstand the huge gravity outside, so that all the matter begins to collapse to the point that it reaches the gravitational radius --- Schwarzschild sphere. The gravitational radius refers to the gravitational limit radius of a star. When this distance is reached, the mass of the star will reach infinity, and gravity will cause light to inevitably --- formation of black holes.

However, the gravitational radius is actually very small, and only stars with a large gravitational force can reach this distance. Like the Sun, its gravitational radius is only 3 km. It is conceivable that the Sun can only turn into a white dwarf, not a black hole.

In addition, when iron is produced in a star, since iron is a relatively stable element, its presence will only cause further dissipation of the energy in the core. It is also an indispensable part of the formation of black holes.

Of course, a black hole does not collapse all the time, it stops contracting after reaching an equilibrium point, but it cannot be less than the gravitational radius, otherwise it will violate Einstein's theory of relativity: when it is less than the gravitational radius, its speed will be greater than the speed of light. However, Einstein's theory of relativity clearly states that the limit frame of reference alone is the fastest.

But the gravitational pull of a black hole keeps light in its belly.

Hehe, I think of a strange kind of black hole, and the way of formation is also more interesting Suppose there is a pair of binary stars, and their masses are not trivial, and they all have the mass to become black holes. So, what happens if they all turn into black holes at the same time? Gravitational wave radiation --- Hawking radiation principle are involved here.

As we all know, black holes are big stomachs, basically devouring hundreds of billions of tons of matter every day. However, according to Hawking's speculation, the radiation of the black hole is present, and it will slowly lose its energy due to this radiation until it disappears itself. The black hole will then move closer to each other due to this radiation, eventually becoming a black hole.

It is important to note that black holes do not move closer to each other due to their gravitational pull, because as I said above, black holes must reach their gravitational radius when they form, but generally speaking, black holes do not fully reach their gravitational radius. The equilibrium point it shrinks is generally a little larger than the gravitational radius. Only objects that enter the gravitational radius can be captured by a black hole.

As a result, there is always a part of the two black holes that cannot reach the gravitational radius (unless one is very small, but rare) and therefore gravitationally independent. In addition, since it is"Binary black holes", so the gravitational force between them becomes a centripetal force, which causes the two black holes to rotate each other. The energy produced when turning also produces radiation, which also makes the two attract each other.

To put it simply, the black hole was a sun before it formed, until one day, it ran out of fuel, it became hollow, and the shell shrank inward because there was nothing to support it, and it shrank smaller and smaller, until it reached its limit, and it became zero, but his original attraction and magnetic field were not only there, but they were stronger than they were before they shrank, because they were zero in volume, and they were invisible to the naked eye. This is just a scientist's theory, and the jury is still out on whether or not there is such a thing.

Changed from a dead white dwarf, the suction of the white dwarf increases after death, and a black hole is created.

How are black holes formed?

The creation of a black hole is similar to that of a neutron star: the core of the star contracts rapidly under the influence of its own gravity, resulting in a strong force**. When all the matter in the core turns into neutrons, the contraction process immediately stops, and the star is compressed into a dense star, as well as the space and time inside.

But in the case of black holes, 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 force generated due to the high quality is such that any object that comes close to it will be sucked into 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 part of the matter, shooting out two pure energy bursts - ray bursts.

This can also be understood in this simple way: usually stars initially contain only hydrogen, and the hydrogen atoms inside the star collide with each other and fuse all the time. 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, causing the star to not have enough energy inside the star to compete with the gravitational pull of the massive star, which triggers the collapse of the star and the supernova**. ** Causes some matter to erupt into space, and they will march inexorably towards the center point until they become an infinitely small and dense star. And when its radius shrinks to a certain point, the mass-induced distortion of space-time makes it impossible for even light to shoot outward—black holes form.

Black holes evolve from stars with masses several times greater than the Sun***. The surface of a black hole is called the event horizon, which is the limit that can be observed by the line of sight. There is a singularity inside, which is infinitely small in size, infinite in gravitational force, infinite in mass, and infinite in energy.

Of course, this is only theoretical, because we have not yet observed it. Black hole.

How are black holes formed?

Speaking of black holes, many friends are familiar with it, the very mysterious celestial bodies in the universe are also very difficult to observe celestial bodies, when the theory of black holes was first proposed, many scientists still questioned it, after all, it was not observed, but now, black holes have been photographed**.

A black hole is formed when the remains of a star 'erupt' are at least twice as large as the Sun.

In the remaining 10% of a star's life, it will gradually become hotter (and more energy will be released). Due to its own mass, it will generate a large gravitational force; As a result, a star can only rely on its own nuclear fusion to produce energy to balance its own gravitational pull. But when its own energy is used up, its own gravity becomes the dominant force, and the lack of force to compete with it leads to the collapse of the star itself, resulting in a more complete collapse (when the mass of the star is smaller, the collapse is not so complete).

A star the size of the Sun will only become a white dwarf, while a debris with more than twice the mass of the Sun will become a neutron star), thus becoming a point with infinite gravity and gravity. Any substance will be sucked in.

And because of its gravitational pull, even the fastest light in the universe can't escape. So, if the light is not reflected, we can't see it. Therefore, it is called a black hole.

Dark matter, like black holes, makes up about 90% of the total mass of the universe. They include white dwarfs, black dwarfs (that is, white dwarfs are completely cooled, but this will take about 100 million years), neutron stars, black holes, cosmic strings (which are the folds in cosmic space, where scientists estimate that there is no life), and so on.

Dark matter plays a large role, it is able to attach to galaxies or clusters of galaxies. Thus controlling the speed of expansion of the universe. If the dark matter is more than 99%, all matter will be restored to a point. Therefore, dark matter is also known as cosmic glue.

When you fall into a black hole, it may be due to the force of space-time distortion that will squish you in one direction and stretch you out in other directions until you look like spaghetti. But what exactly happens inside. Nothing is known to the current physics community.

To make it simpler, we can think of the universe as a sheet of bed with four people pulling its sides tight, and the star is a bowling ball, and when the bowling ball is placed on the sheet, the sheet collapses, but not enough for the sheet to collapse too much. Then you imagine that the bowling ball becomes the size of a grain of rice and its original mass does not change, and if the sheet is tough enough, the 'ball' will start to collapse too much, and when you put anything on it, it will move towards the collapse of the rice grain, which is why the black hole attracts anything.

Of course, this metaphor is not enough to be vivid, but the general meaning is this!!

According to Einstein, the reason why black holes attract any matter is not because it has a large gravitational pull, but because black holes make space collapse very seriously, as long as it is within a certain range of the black hole, it will move towards the black hole due to the collapse of the nest.

Black holes are simply a special form of star. It is what we often call the wreckage after death.