The surrounding chemicals can't escape the magic of the black hole, and the black hole itself is very big, and the mass of a bigger black hole is already tens of millions of times that of sunlight. As for the composition of black holes, astronomers believe that it is composed of a large number of galaxies merging together. In the early days of the formation of the universe, it is very likely that dozens or hundreds of galaxies gathered together, which led to today's space situation.
The structure of the universe is generally that small galaxies form large galaxies, and large galaxies form higher galaxies. And every merger takes tens of millions of years or even longer, and we can't feel the creation of this cosmic structure immediately. The basic theoretical scholars of astronomy can use computers to simulate the whole merger process. In the whole process of simulating the formation of the cosmic structure, the black hole in the center of two merged galaxies actually became a big obstacle.
Head-on collisions of black holes are very rare. This is because when two black holes meet, their paths are different. Because of the conservation of angular momentum, they approach each other in a rotating way. When attracted by each other, the distance between the two black holes will become smaller, and when the distance between the two black holes is only one second (one second, equivalent to 300 million light years), there will be drastic changes between them. Two black holes are like lovers in their first love, refusing to go any further.
How can two black holes be unwilling to merge? For example, scientific researchers have tried to imagine a person's hand as a black hole, put it in a pure bucket and let the water rotate. In a gradual situation, water will hinder the hand fitness exercise and slow down the hand fitness exercise. This kind of gravity is called dynamic friction in astronomy. This kind of force will reduce the angular momentum of black holes and then let two black holes gather in the middle. When the water rotates in the same direction as the hand, the hand will suffer. In the whole process of simulating the merger of galaxies, the rotational orientation of black holes will endanger the adaptive motion paths of planets and other stars. When the dynamic friction decreases, the two black holes tend to be stable in the new orbit, and their positions will not change easily.