Then three astronauts flew to Beijing. When they got off the plane, they were still sitting in chairs and the staff carried them off the plane. When they salute the relevant leaders, they also sit straight in the chair and salute instead of standing up. Why is this? Can't astronauts stand up when they go to outer space?
It is well known that the environment in outer space is harsh, vacuum and high radiation. In addition to these problems, when flying in outer space, because the spacecraft is relatively fast, the centrifugal force will offset gravity, so the astronauts in the spacecraft will be in weightlessness. In weightlessness, astronauts will float. From the pictures sent back, we can see that the astronauts are floating freely in the spaceship instead of standing on the surface of our earth.
Humans have lived on the earth for millions of years, and our bodies have already adapted to the gravity environment on the ground. Under the action of gravity, blood can naturally flow to the feet, and the heart can "pump" blood to the brain of the upper body. But when we go into space and are in weightlessness, our blood can't naturally flow to our lower limbs, and there will be more blood in our brain. Besides, after living on the ground for a long time, our bones and muscles have already adapted to the gravity environment on the ground. However, when we enter the space environment, our bones will completely relax under weightlessness. Keep this state for a long time, bones will be lost and muscles will shrink.
When astronauts return to earth after a long flight in outer space, they return to the gravity environment on the ground from weightlessness. It is difficult to adapt to the changes in the environment in a short time, and it takes time to adapt. Therefore, after leaving the cabin, the astronauts were first allowed to sit in a chair to adapt to the environment. After arriving in Beijing, they were also carried off the plane by the staff. But don't worry, because it will return to normal after a period of adaptation.
As our Shenzhou XII spacecraft is about to return to Earth, Space Exploration Technology Company also launched a Falcon 9 rocket to carry out the "Inspiration 4" mission, and sent a manned dragon spacecraft and four passengers into space to fly around the Earth for three days. After completing the flight around the earth, the dragon spacecraft splashed down in the Atlantic Ocean, and then the mission recovery team of Space Exploration Technology Company took a small boat to the splash point of the spacecraft and hoisted the manned dragon spacecraft to the recovery ship.
This is the first fully commercialized space flight. The passengers on the plane included billionaire jared Isakman, geologist Shane Proctor, doctor assistant Harry Ahlsen Neo and data engineer Chris Sen broschi. They are not trained as professional astronauts. This is a space mission for all civilians.
After receiving the spacecraft, the staff opened the door of the return cabin and connected four passengers to the platform of the recycling ship. Ahlsen Neo was the first to leave the cabin, while Ahlsen Neo was the last. When he left the cabin, arsenio looked like a toddler, his legs were shaking, which was adapting to the gravity of the earth. Although all four passengers are standing, we can see that they are still not very stable. The reason why they stand up and walk is related to their flight time. The flight time is relatively short, only three days, and the time to adapt to the earth's environment is relatively short.
Moreover, after the four passengers leave the cabin, even if they try to stand and walk, they need the help of the staff to avoid falling. It can be seen that at present, the sacrifice of space flight is still too great for us, and the price is to adapt to different environments, and the body may change because of different environments.