The explanation of physics view is that a black hole is actually a planet, but its density is extremely high, and objects close to it are constrained by its gravity (just like people on earth will not fly away). For the earth, you can fly away from the earth at the speed of the second universe, but for a black hole, its speed of the second universe exceeds the speed of light, which is the limit speed. So even the light can't run out, so the light that comes in doesn't reflect back, and our eyes can't see anything but black.

Whether there is a black hole or not may be the most mysterious place in the universe. Since the black hole theory was put forward, Einstein and Hawking have affirmed the existence of black holes. Most scientists are committed to finding evidence of the exact existence of black holes in order to improve the theory of black holes. NASA even wants to conduct a "census" of nearby black holes. However, a group of American scientists put forward a brand-new view that the so-called black hole does not exist at all.

""That is to say, if there is a black hole, it is hard to imagine that everything will be sucked in, and it will definitely be sucked into the air (this phenomenon changes with the molecular structure or atomic structure of the object) "