The growth history of black holes, a brief introduction to the development history of black holes

Is it possible to have the strongest gravitational planet in the universe? According to the theory of general relativity, is a black hole the more things it absorbs, the greater or the smaller the gravitational pull? It's constant, it only decreases over time, but it's insignificant, does it grow in size after absorbing a large number of planets, or does it keep its original volume?

I don't know if every black hole will eventually disappear on its own, but it will take a long, long time, at least billions of years. When the volume gets smaller and the density gets bigger and bigger, both values become variables, and then the black hole does not disappear.

Chinese name Black Hole.

The foreign name is black hole

Classification of cosmic objects.

Discovered by Karl Schwarzschild in 1916.

Average density = 3mc2 8 gm

Surface temperature t=hc 3 8 kgm

Escape velocity exceeds the speed of light within the horizon.

Albedo 0 main explorers Stephen Hawking Einstein Schwarzschild.

Half-path for Schwarzschild black holes: rs=2gm c2

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, 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 that is unimaginably dense in the bright pulse.

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 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 exists in the interior of the star, resulting in the star not having 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 outer shell, the core begins to collapse, and the matter will march inexorably towards the central point, until finally the formation of an infinitely small and infinitely dense star.

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.

The formation of a black hole is when the star is extinguished, due to its own gravity begins to contract, **, and fusion, while compressing the space and time inside. Due to the gravitational pull generated by the high mass, the core of the star begins to suck in anything that is close to it, and the light cannot be shot outward, and the black hole is born.

The formation process of a black hole

In modern general relativity, a black hole is a celestial body that exists in the universe, mainly composed of a scalar polynomial constructed from the tensor of Riemannian curvature and the singularity that diverges here and the surrounding space-time.

The name "black hole" was given by American physicist John Archibald Wheeler. It's an incredible celestial body with a shadow at its center.

When it comes to the formation of black holes, it is very similar to the creation of neutron stars. The first condition for the formation of a black hole is a star that is about to die.

When a star is about to die, the interior of its core begins to contract, collapse and ** under the influence of its own gravity. All matter begins to shrink and converge towards the center, and at the same time compresses the space and time inside.

The gathered substance is crushed into powder under suction and extrusion, turning it into a very dense substance. When matter accumulates to a certain extent, it causes space-time to distort, so that light cannot be emitted outward, and black holes are created.

The creation of black holes is similar to that of neutron stars;

As the star prepares to perish, the core shrinks rapidly under its own gravity, resulting in a strong **. When all the matter in the core turns into neutrons, the contraction process stops immediately. It is compressed into a dense form, and at the same time compresses the space and time inside.

Because the mass of the stellar core is so large that the contraction process goes on endlessly. Even the repulsive force between the neutrons could not be stopped, and the neutrons themselves were crushed into powder by the attraction of the extrusion gravitational force itself, leaving behind a material that was unimaginably dense. The gravitational pull due to the high quality causes any object that comes close to it to be sucked in, and the black hole becomes like a vacuum cleaner.

At the end of the development of cosmic celestial bodies, the volume became smaller, the mass became larger, the gravitational force became larger, and the photon could not escape its gravitational pull, so a black hole was born.

A star slightly larger than the Sun, as long as it exceeds the Chandrasekhar limit (the mass limit required for a star to collapse), will collapse because it cannot withstand its own huge gravitational pull, forming a massive and very small black hole, its gravitational density is so dense that light cannot escape, so it is not visible, but its pulse can be detected.

A black hole swallows material within the event horizon (the black hole's boundary), enlarging the event horizon and emitting radiation.

You can read a brief history of time.