During the space flight of 160 days, with the support of ground technicians, three astronauts successfully completed two extravehicular activities and two "Tiangong Classroom" space teaching activities, and carried out a number of scientific and technological experiments and application projects. Wang Yaping became the first female astronaut in China to carry out extravehicular activities. The astronauts docked the cargo spacecraft with the space station for the first time through on-orbit remote control operation. The flight crew set a new record for the continuous flight duration of China astronauts in orbit, which laid a solid foundation for the subsequent construction of the space station.
What should I pay attention to on my way home?
"First of all, make sure that the return capsule is well sealed when it is separated from the orbital module." Jiao Weixin said that the air leakage in the engine room was originally inaudible and invisible. With the progress of science and technology, we have been able to detect whether there is air leakage in the engine room through 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.
"Second, when the return capsule enters the atmosphere and is more than ten kilometers from the ground, the parachute is smoothly deployed." 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.
"The' black barrier' phenomenon that some people are worried about is not the main concern of the return cabin." Jiao Weixin said that the "black barrier" is not so terrible, because it appears in a very short time and the affected flight distance is relatively short, which is not enough to cause substantial danger.
It is understood that the return capsule began to re-enter the atmosphere when it was more than 0/00 kilometers away from the ground. When the return capsule re-enters the atmosphere at the speed of 7.9 km/s, it will have a violent friction with the atmosphere, making the return capsule become a flashing fireball, and the plasma gas layer generated around it will shield electromagnetic waves. At this time, the friction between the surface of the return capsule and the atmosphere will form a "black barrier", which will temporarily make the return capsule lose contact with the ground until it is about 40 kilometers away from the earth.
But you may not know that after landing, they need to be isolated. It is said that it will take some time for astronauts to get used to it after they come back from space. After all, the environment in space is very different from that on earth. Recently, a friend came to ask me, should astronauts be isolated when they come back from space? Do astronauts need isolation when they return from space?
Should astronauts be quarantined when they come back from space?
astronaut
Astronauts need to be isolated from space.
1, in order to prevent space bacteria from being brought into the earth.
After returning 14 days, astronauts can't go home, but their families can visit. This is to prevent the spread of mutated bacteria. Because the spacecraft will suffer from all kinds of cosmic ray radiation in space, this radiation may cause variation to living things. For example, we often bring some seeds, and sometimes we can grow super-high-yield "space crops" by using this characteristic. If some bacteria in the spacecraft also produce this mutation and become "space bacteria", the consequences of diffusion will be unimaginable.
2. For the physical and mental health of astronauts.
In space flight, astronauts are isolated from the world. Closed and narrow cockpit, quiet space environment, prescribed communication mode, limited contact with the ground and discomfort caused by weightlessness are all easy to cause a series of psychological problems for astronauts. At the same time, astronauts have just resumed their role in gravity, and their bodies need some time to adapt. Another point is that astronauts who have lived in space for a long time are generally weak when they return to the ground. Any common virus on the ground may cause fatal damage to them.
In this regard, "astronaut head coach" and Chinese manned spaceflight engineering expert Huang said that the environment in the spacecraft cabin is well controlled, but the immunity of astronauts will change due to long-term flight. Taking isolation measures is the protection of astronauts. "
When landing, space medical experts will provide medical supervision and medical support for astronauts by combining urine, saliva and other samples collected during the astronauts' orbit.
What astronauts feel most obviously after returning is the inadaptability brought by the long-term weightlessness environment. The astronaut center has prepared a recovery plan for astronauts in a more targeted manner.
Physical recovery can be divided into three stages: medical isolation period, medical recovery period and recovery recovery period.
The first stage: medical isolation period
About three weeks to four weeks, according to the three-level isolation system, astronauts are basically isolated from the outside world.
Astronauts will get enough rest and nutrition, and then they can exercise some upper limbs moderately to promote the redistribution of body fluids, improve the cardiovascular regulation function, and carry out related physical therapy and physical and mental recuperation.
Astronauts need to adapt to the gravity environment of the earth, improve the cardiovascular system and support the function of motor organs, improve standing endurance and eliminate fatigue after flight. Astronauts will also receive massage or some gradual exercise to restore their physical and mental state.
The second stage: medical recovery period
This phase will last about 20 to 30 days.
Astronauts will stay in a sanatorium with good weather and good air, and gradually increase their activities while continuing to recover.
The third stage: recovery in the rehabilitation period
This stage lasts about 3 months.
The physiological parameters of astronauts will return to the pre-flight state. If the astronauts are in good health after 3 months, they will start normal daily training.