What physical knowledge does interstellar have?

Tell me about chapter 14 of Black Hole and Time Warp, which is about wormholes and time machines:

First of all, Kipa Thorne told an interesting story about him:

1985, Kipa Thorne got help from his old friend carl sagan for many years. Carl wrote a science fiction novel, hoping to write the scientific theory in the novel more accurately, and wanted Kippa Thorne to give him some advice. Kipa found that the heroine in the book actually fell into a black hole and then traveled through time and space, which is impossible. So Kippa wrote to suggest that Carl should rely on wormholes for interstellar travel. Carl readily accepted this suggestion, and the novel was named Contact. Later, it was made into a film called "Time and Space Contact", also starring Matthew, and the evaluation was very good.

Then Kippa Thorne started talking about wormholes:

1. Where is the wormhole?

There are three theories about wormholes:

First, a wormhole is a shortcut between two distant points in the universe, which is an apple. Worms go far along the surface of the apple, but if they dig holes, they go much closer from the inside of the apple. Gu Mingsi thinks that worms dig holes in the apple to cut corners.

Second, wormholes are pipes connecting black holes and white holes or black holes and black holes, so wormholes can be found in black holes. (White hole: When a black hole dies, it will become a white hole, ejecting the substances previously inhaled by the black hole)

Third, the wormhole is a time tunnel, which can travel in time and space.

No one has ever seen a wormhole. Some people say that there are wormholes everywhere around us, and some people say that there are wormholes in black holes. Kipa Thorne also said in his book that we can build our own wormholes.

Second, negative energy matter.

Wormholes appear at a certain moment, open briefly, then close and disappear. From appearance to disappearance, the time is so short that nothing can pass from one hole to another in such a short time. Therefore, only if there is a way to keep wormholes open and prevent them from disappearing, can we use wormholes for time and space travel.

Kipa Thorne thought something strange could penetrate the wormhole and keep it open. This strange thing is very different from any substance that humans have seen. It has negative energy.

In fact, negative energy is not difficult to achieve, and it can be achieved with different reference frames. When the spacecraft approaches the wormhole at a speed close to the speed of light, the energy around the wormhole naturally becomes negative.

Therefore, to enter the wormhole, the speed of the spacecraft must be close to the speed of light.

Third, the time machine.

Assuming that we can find the wormhole and have some negative energy to keep it open, then the wormhole can be a time machine.

To enter the wormhole, the speed of the spacecraft should be close to the speed of light.

According to Einstein's theory of relativity, if you are fast enough in space, you can stay in space for dozens of days, but on earth for decades, so as to achieve what the ancients said: one day in the sky, one year on earth, that is, 20 14 years, and you travel to the earth for one month in a spaceship close to the beam, you will find that the earth is already in 2044, thus realizing the crossing into the future.

So we can guess the plot. When the protagonist goes to other interstellar spaces to complete the task and returns to Earth, their children are as old as the protagonist.

The current scientific theory shows that it is impossible to go back to the past.