Are black holes matter? Are black holes really black? What s in it?

It's substance. A black hole is formed by a massive celestial body that collapses by gravity after its nuclear energy exhaustion and death. According to Newton's universal gravity theorem, black holes are named black holes because the first cosmic velocity is so great that even light cannot escape.

The gravitational pull in this area is very strong, and it is impossible for any matter to escape from this area, and even the light is pulled back by its strong gravitational pull, so the black hole itself does not emit light, but the black hole does not appear black like other objects that do not emit light, and the gravitational pull of the black hole can make the light behind it go around in front of it, making you think that it is transparent. Astronomers can find out the location of a black hole by observing the attraction of material around it.

Be. A black hole is actually a planet, but it's so dense that everything near it is confined by its gravity (as if a person hadn't flown away on Earth). For the Earth, it is possible to escape from the Earth by flying at the second cosmic speed, but for a black hole, its second cosmic speed is so great that it exceeds the speed of light, which is already the limit speed.

So we can't even get the light out, so the light that comes in is not reflected back, and our eyes can't see anything, it's just black. ”

Black holes are matter, and they are much denser than all the matter currently found on Earth.

Yes, a black hole is not actually a hole, you will learn gravity in high school, the larger the mass, the smaller the radius, the greater the force, and the black hole is a planet with a super high density (both mass), but a small radius, so that it produces a huge gravitational force, absorbing everything, and vividly describing it, it is to compress a planet many times larger than the sun to only the size of the earth, and its density and gravity can be imagined

What is <> black hole?

The founder of black holes was Albert Einstein, and it was Karl who first calculated the concept of black hole entities. Schwarzschild. And Karl. Schwarzschild discovered that black holes are a natural law of Einstein's theory.

The universe began with a big **, and for the devil in the universe ......Black holes, people are naturally curious about it. A black hole is not a dark empty space, Einstein's theory of relativity predicted how black holes are formed; When a massive star dies, it leaves behind a smaller remnant core with a singularity at least three times the mass of the Sun, and gravity overwhelms all other forces into a black hole. But don't let its name fool you, a black hole is not a hole at all, but a huge mass crammed into a small space.

We know that the radius of the Sun is 700,000 kilometers, and if it were to become a black hole, the radius would have to shrink considerably. Astronomers have calculated that the Sun becomes a black hole, the diameter of which is only 3 kilometers. The Earth is even more pitiful, with a radius of more than 6,000 kilometers, and if it becomes a black hole, its radius will shrink to only a few millimeters.

Think of the sun and its gravitational field 28 times that of the Earth, and if you were to walk in the sun, you would be 28 times heavier than the Earth, and the same is true for black holes.

The creation of a black hole is similar to that of a neutron star, where the core of the star rapidly contracts and collapses under the action of its own gravity, resulting in a strong force**. When all the matter in the core turns into neutrons, the contraction process stops immediately, and it is compressed into a dense star, which also compresses 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 portion of the matter, emitting two streams of pure energy.

It can also be simply understood: usually the star originally contains 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 their structure to form 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.

The inside of a black hole is black. The matter in the black hole has elementary particles, as well as molecules, and some other matter, and there are many minerals, which also contain a lot of energy, and emit a lot of gravitational pull, which is so strong that even light can swallow it.