Magical black hole journey

If there is magic to make an astronaut drill into the black hole safely by spaceship, he will tell us a lot of amazing things. Since the scene is a rotating black hole, what he tells is probably a layer of energy. All the movements in that area rotate according to the rotation of the black hole. After drilling into the area, the spacecraft may keep up and down, coming and going from this area. Of course, there must be enough fuel.

If our stubborn astronaut is determined to go further and to drill into the second interface called the horizon, he will find that under certain conditions, because of the strong centrifugal force, the spaceship will stay there for ever to spin and no longer sink, but there is no possibility of it coming out. This situation is similar to the large cylinder rotating in the open amusement park. It squeezed people on the wall of the cylinder, so long as the cylinder was rotated, people could not move.

The black hole itself is a mysterious object. It is like a runaway computer, which can swallow any information and destroy the contents of anything that falls into it. The physical properties of black holes that we can collect are three, mass, angular momentum and charge. The rest is a bunch of useless information, which is of no help in identifying the material properties inside the black hole.On the point of singularity, that is, the central density of black holes is infinite, Einstein's general relativity and the derived laws of space and time will all be invalid and no longer have the right of "citizen".

But Stephen Hawking, the great black hole theorist and British astrophysicist, has found valuable information about the appetite of black holes in the field of vision by clever escaping. The more matter a black hole suck in, the more its mass will increase, and the more it expands its horizon. It's such a fast energy exchange scene that it's hard for nature to detect.

Compared with the rotated Schwarzschild black hole, the internal structure of the rotating Kerr black hole is much more complicated. Its singularity is a circle lying on the equator rather than a point. If an astronaut passes through the ring, it will reach the opposite area, where there is a white hole. It is like a catapult, which can immediately launch the astronauts to the outer world, which is another universe. In addition, there are second horizons within the real horizon of the Kerr black hole. The spherical bread is surrounded by "singularities" protected by circular singularities. The region between the inner and outer boundaries is not affected by singularity. With the increase of the angular momentum of the black hole, the expansion of the inner horizon and the contraction of the outer horizon make the two tend to coincide.