Astronauts return to earth, why can't they stand up and sit in a wheelchair after leaving the cabin? Sacrifice too much

Space is a mysterious and fascinating world. Many people envy astronauts, who can fly into space and enjoy the unique beauty of the universe.

After the spacecraft landed on the earth, people who were waiting anxiously were looking forward to the astronauts leaving the cabin early and seeing the infinite elegance of space heroes.

On April 16, the return capsule of Shenzhou XIII manned spacecraft landed successfully at Dongfeng landing site. On-site medical staff confirmed that astronauts Zhai Zhigang, Wang Yaping and Ye Guangfu were in good health, and the manned mission of Shenzhou XIII was a complete success.

However, careful friends will find that after the astronauts return to earth, they will be out of the cabin for a long time. The reason why astronauts sit in chairs after returning to earth is actually because they really can't stand up, which is naturally related to their experience after going to space.

First of all, when the return module is separated from the orbital module, it should ensure a good seal.

There is air leakage in the engine room, which was originally inaudible and invisible. With the progress of science and technology, it has been possible to detect whether the engine room is leaking by instruments, which is convenient for timely adjustment.

In addition, the spacesuit pipeline of China astronauts is connected with the oxygen device in the cabin, which can ensure the astronauts to supply oxygen for a long time even if an accident occurs.

The second is the smooth deployment of the parachute when the return capsule enters the atmosphere and is more than ten kilometers from the ground.

Jiao Weixin said that the speed of the return capsule returning to Earth is relatively fast. If it does not slow down, the consequences will be unimaginable. The parachute equipped this time is half the size of a football field, which is enough to ensure the buffering effect.

In addition, in addition to the main umbrella, there are backup umbrellas, the area of which is about 80% of the main umbrella, so the safety of astronauts landing is guaranteed.

When the space hero returns to Earth, why can't he stand up after leaving the cabin and need a wheelchair?

First, the gravity environment.

As we all know, the development of human body is closely related to the gravity environment of the earth, and the development direction of our physiological characteristics is bound to be consistent with it, but when we enter space, the gravity environment will be completely changed.

The astronauts' bodies are basically in a state of weightlessness. Faced with this situation, the physiological system must be adjusted accordingly in order to continue to maintain normal life activities, and even the psychological level will change.

In other words, man is an animal that lives on the surface of the earth and is influenced by the gravity of the earth. Gravity has a great influence on the oxidation and structure of human body. Without gravity, the human body will have various abnormalities, and the environment in space has many influences on the human body. The most relevant thing about returning to earth is the effect of weightlessness.

Second, the quality of aviation personnel is lacking.

Waiting in space for a long time, people's muscles and bones will continue to lose. For example, an astronaut with external reactions will have a lot of skin on his feet and become as fresh and tender as a baby, which is mainly reflected in his bones and muscles.

Due to the lack of exercise and gravity, both of them will be considered useless by the body, especially muscles consume a lot of body nutrients. After entering space, the human body will quickly lose these two important body mechanisms, which means the loss of bones.

Therefore, after returning to the surface, the human body has to bear its own weight, and it has to bear the cabin suit with a total weight of about 20 kilograms, which is very likely to cause astronauts to fracture. Therefore, after the astronauts come out, they sit in a chair instead of walking by themselves.

Therefore, before the astronauts leave the cabin, medical insurance personnel will enter the cabin to assess the health status of the astronauts and help them replenish drinking water and nutrient solution. In order to prevent accidents, all activities after leaving the cabin should be seated.

Conclusion:

After returning to the ground, we heard the astronauts say the words "feeling good". In fact, there are countless hardships behind it. They have made great sacrifices for the development of China's space industry and truly accomplished their great mission with their lives.

Salute to all astronauts, you have worked hard!