The 21st century is a new era in the development of science and technology. People gradually understand the structure of the world. The emergence of various micro detectors has also turned our attention to the universe. We are full of curiosity in the unknown field of outer space. It is precisely because of this that we gradually understand Space, but space is always wrapped with a layer of yarn, and we cannot see its full face, so some speculations have appeared in front of us. For example, when black holes appeared, scientists were guessing whether humans can pass through black holes. Whether the gap in the sky exists in the third world, in fact, our guess is still based on certain facts.