Is a black hole a hole? Maybe many people have seen the black hole in the real world. It is a dark hole without light. But is it the same with black holes in the universe that scientists are keen to study? Let's take a look at its magic power first. People guess that black hole is also a celestial body, but compared with other celestial bodies, its suction is stronger. So strong that any object can be attracted in, even light can make it bend. Moreover, in addition to its great attraction, it can also "hide", and people can't observe its existence at all. In fact, the formation of black holes is related to the aging of stars.

When a star slowly becomes old after countless years, its internal fuel (hydrogen) is almost exhausted, and the thermonuclear reaction supported by the fuel can no longer continue, and the resulting energy is also consumed less. In this way, it will lose enough strength to support its "weight". Therefore, under the heavy pressure of the huge shell, its core is unable to support and can only begin to collapse. The shell material is irresistibly collapsing towards the center. The final result of the collapse is the formation of a star with large density and small volume.

Then, as the form shrinks and shrinks until it shrinks to a certain extent, it is born. This kind of space distortion is very attractive, even if the light meets it, it can't shoot out. This is what we call "black hole". Will black holes get fatter and fatter? A black hole is like a bottomless hole in the universe, which can suck in all the matter that comes into contact with it. So, if black holes like "eating" so much, will they become "fat" gradually? The answer to this question is yes. However, in view of this problem, many people fall into a misunderstanding. They only care about how much the noumenon increases after the black hole devours the matter, but ignore the existence of the horizon of the black hole.

Source: @o___sim