How are black holes formed? 5

Black holes are a class of stars with extremely high densities. Due to the huge gravitational field around it, all the matter that passes through it is sucked in, not even light can escape, and similarly, objects in a black hole cannot escape from the black hole. We know that if an object on Earth gains a large initial velocity, it can break away from the gravitational pull of the Earth and fly into space.

The speed is high enough to escape from the sun's gravitational pull and escape the solar system, and humans use rockets to launch satellites or spaceships using this principle. The minimum initial velocity of an object to escape from the Earth is determined by the mass and radius of the Earth, if the Earth is compressed into a very small ball, when its radius is less than a certain critical value, the gravitational pull on the surrounding objects will become very large, even the fastest wave of light in the universe will be absorbed by the Earth and cannot escape, then the Earth will become a black hole.

According to the theory of stellar evolution, a black hole is the final stage of stellar evolution, that is, a dead star. Since black holes do not emit matter or radiation, we cannot observe them directly. But a black hole can form a binary star system with a neighboring star, and from the Earth, the visible star (companion star) appears to be waltzing with an invisible celestial body (see figure), and the mass of the invisible celestial body can be deduced from the degree of its motion, and if the mass of the celestial body is very large, it is likely to be a black hole.

In addition, the huge gravitational pull of the black hole causes the gaseous material of the companion star to rush into the black hole in a spiral orbit, and due to the rapid compression, the temperature of the matter becomes very high, and rays and gamma rays are generated, and these rays can be observed on Earth to find evidence of the existence of the black hole.

To put it simply, the star dies and shrinks, and finally becomes something with super gravity! Even the light will be sucked away if you walk from the side! So the stellar wreckage we see is the Black Ground!

Because anything that comes close will be sucked in! So it's like a hole again! Together, it's what people call a black hole!

In the universe, stars have a very large mass and will have a super-large volume (such as the sun), but stars also have birth, old age, sickness and death, when the star dies (the star here is a massive star, the mass is several times to dozens of times that of the sun), because the pressure that the star can provide is not enough to balance the gravitational force, causing the star to quickly collapse inward, which in turn leads to **, releasing a large amount of energy (supernova**).

Scientists define a black hole as a celestial body with such a curvature of space-time that no light can escape from its event horizon. According to reports, black holes are created by the gravitational collapse of stars that are massive enough to die after they run out of fuel for nuclear fusion reactions.

It is because some stars in the universe have undergone qualitative changes and produced some huge amounts of energy, which are called black holes.

Black holes are formed by the collapse of stars**, the mass of the black hole is very high, it is small, but it can swallow planets several generations larger than him.

Black holes are mainly caused by the gravitational collapse of very massive stars that run out of fuel for their nuclear fusion reactions.

Through scientific research, it has been discovered that black holes are created by violent reactions of energy.