The universe is very large and boundless, far beyond human cognition, so the fear of the unknown makes people full of suspicion. In ancient times, some people even proposed the theory of "a round sky and a square earth". Later, it was rejected by scientists one by one, and human exploration has gone further.

With the progress of the times and the development of science and technology, the world that people know is getting wider and wider. Astronauts have successfully launched into space, Chang'e-1 has successfully landed on the moon, and man-made satellites have been successfully launched one after another. I learned that the sky is not round, the earth is. The world we live in is actually a ball.

Then the universe was discovered. In this boundless space that seems huge to humans, there are countless large and small planets. In the civilization created by humans, it is called the universe, and the sun is called the sun. , the moon is the moon. Humanity has also discovered a space that has not been explored so far, that is, black holes.

Human civilization calls it a black hole. Or is it because of the fear of the unknown world that people have questioned the conjecture of black holes. Is it really a hole? Scientists have studied this for many years and believe that a black hole is a crack caused by the tearing of space. It is like a piece of plastic wrap that has been stretched. There is no gravity and only tension. If the partial pressure is too high, wrinkles will form without tearing. The black hole is the human response to the phenomenon. This fold is a one-sided conjecture.

In fact, this world is full of wonders, and we still have to be in awe of the unknown time and space. Some people boldly claim that a black hole is a tunnel that can travel to a long time ago or a long time later. This speculation is not widely accepted by the public. In fact, there are different opinions on this matter. What is known now is that humans cannot enter black holes to explore. The pull of space-time distortion will cause life danger. Of course, this concept changes if an accident occurs, but so far this accident has not happened.