Why do astronauts have to be quarantined when they return to Earth from space?

<> many friends know that as astronauts, they are quite hard in their usual training, not only need to overcome their physical limits, but also need to have a long-term construction psychologically to be able to serve as an astronaut, and although the position of an astronaut seems to be very honorable, but in fact everyone takes a huge risk when accepting the mission, and astronauts are often protected by special personnel when they return to Earth after successfully completing their space missions. Almost in the form of isolation, let them live alone for a period of time, and many friends will wonder, why should these space heroes be treated like this? What kind of changes have they made?

In space, due to the weightless environment, it often leads to changes in some elements of these astronauts' bodies, such as gray matter and protein in the brain, etc., some subtle changes will occur, and people's cerebrospinal fluid will also be in people's cerebral cortex, so after the body adapts to the space environment, if you just return to the earth, like a baby, it is relatively weak, and many astronauts will feel severe dizziness and discomfort when they just return to the earth. And we know that people and animals are very able to adapt to changes in the environment, if people are in a sterile environment for a long time, and then return to the living environment with bacteria, it is very likely to be infected with some fatal diseases, and the body may not be able to resist the invasion of bacteria.

So this isolation of astronauts is actually a disguised protection for them, and at the same time, because astronauts may also have various cosmic rays in space to radiate them, so it is unknown whether the cells on the body of these astronauts will mutate, although they have the protection of spacesuits, but for unknown situations, it is still difficult to guarantee that the body of these astronauts will not be affected by space rays.

Therefore, it is also very likely that the cells or germs carried by these astronauts will mutate, causing certain dangers to the living environment of human beings, so no matter which country's astronauts, even after performing a hard mission, when they just return to Earth, they still need to be isolated coldly, on the one hand, for the health of these astronauts, on the other hand, for the safety of other personnel in the aviation base, only in this way can the next aviation mission be carried out smoothly.

The first is to prevent astronauts from bringing back unknown viruses from space, astronauts need to undergo a full body examination and a long period of reasonableness, and secondly, to transition back from the state of space flight during quarantine.

Because astronauts are in a state of weightlessness for a long time in space, their bodies undergo subtle changes, which need to be isolated and slowly adapted, and there are many space rays in space, which may mutate their radiation, and isolation can prevent danger to the living environment.

Due to the unknown environment in space and the presence of a large amount of radiation, astronauts may have some radiation left on their protective suits, and may also be contaminated with some bacteria and viruses that we do not know, so they need to be quarantined for a period of time when they return.

Because they are so lonely in space, they bear a lot of things psychologically, and they need to release them one by one.

Isolation is the protection of astronauts, but this has nothing to do with the new coronavirus, but a protective measure for the astronaut's body.

After all, the environment of astronauts in space is different from that of the earth, and long-term flights will change the astronaut's physical condition in all aspects, and the immunity will also decrease, so it is necessary to isolate for a period of time to recover.

I remember that when Yang Liwei returned to the ground, he was unable to walk, and he was carried out by the staff. The environment in space is not good, and the level of human science and technology cannot completely solve the threat to human health. In space, the greatest impact on human health is weightlessness and cosmic radiation.

This isolation stage, also known as the isolation recovery stage, is mainly to allow astronauts to have sufficient rest, balanced nutrition, and then do some exercise moderately. Doing so promotes the redistribution of fluids and improves cardiovascular function.

This isolation stage, also known as the isolation recovery stage, is mainly to allow astronauts to have sufficient rest, balanced nutrition, and then do some exercise moderately. Doing so promotes the redistribution of fluids and improves cardiovascular function.

At the same time, during this period, the astronauts will also be provided with relevant physiotherapy and physical and mental recuperation. In short, it is to allow astronauts to recover as soon as possible, to be able to adapt to the earth environment from the sterile environment of the sky, and to not affect their future lives.

At the earliest, the three astronauts who landed on the moon Apollo in the United States in 1969 returned to Earth and were quarantined. However, at that time, people did not know enough about the environment in space, for fear that some terrible unknown viruses in the universe would be brought back. Especially the three astronauts who landed on the moon at that time, which meant that they had direct contact with the moon, and no one knew what was on the moon, so they were simply isolated for a period of time to observe the situation.

However, later it was discovered that the moon was different from what we imagined, there was no sign of life at all, and of course there could be no viruses or other life forms, so there was no point in isolation.

However, it was later discovered that the astronauts' bodies were still greatly affected in the sky, and in order to allow them to recover as soon as possible and return to normal life, they would still be quarantined for a certain period of time.

Astronauts can't adapt to the ordinary environment of the earth all of a sudden, so they need to be isolated to assist them, this process is a protection for their bodies, in order to let them return to normal as soon as possible.

Just imagine, you have lived in weightlessness for so long, and suddenly you are normal, how can you adapt to it all at once, it must take a process. This is actually quite normal.

The space environment is different from the ground, and the out-of-warehouse activities also have to be irradiated by some cosmic rays, so after coming back, various physical indicators must be tested, not only to protect the astronaut, but also to protect his family!

Why should astronauts quarantine when astronauts return to Earth? Regardless of what they say, it is actually giving them time to rest, and if they say it, if they are in the air, they may have found somewhere else.

Because it is necessary to check the physical condition and observe what discomfort there is in the body.

<> generally speaking, more than 100 kilometers above the Earth's surface is the space domain. The flight altitude of manned spacecraft is generally 300-400 kilometers, such as China's Shenzhou spacecraft.

series, as well as the International Space Station.

Well, suppose someone directly from a spaceship 350 km high.

Jump up and down, what will be the result?

First of all, space is very high, there is almost a vacuum there, there is no room for people to breathe. So, if you want to jump off space, you need to carry oxygen that provides breathing. In comparison, the average skydive is only 4 kilometers high, and the skydiver does not need to carry oxygen because the air at this altitude is enough for one to breathe, and the skydiver will soon be on the ground.

In addition, the most different from ordinary skydiving is that the spaceship takes people around the earth in space at high speed, reaching a speed of kilometers per second, which is 100 times that of a bullet. Spacecraft do not fall in space because of their high horizontal velocity, centrifugal force.

and gravity in equilibrium.

So, what would an astronaut go through if he opened the hatch of a spaceship and jumped to Earth?

Space hoppers don't immediately fall straight to the ground. As mentioned earlier, astronauts in space are moving at a speed of kilometers per second. After the jump, the space jumper also gains this speed due to inertia.

Due to the proximity of vacuum in space, there is very little resistance to flying objects. As a result, space hoppers do not fall back to the ground as quickly as regular skydivers, but continue to circle the Earth.

However, the space jumper has no incentive to maintain his original orbit, and as a result, over time, his orbit will slowly lower and gradually fall towards Earth. When space hoppers begin to enter the atmosphere.

, in the event of a violent friction with the dense atmosphere, his speed will quickly slow down and produce a high temperature of thousands of degrees. In the process, space hoppers will most likely burn out.

It takes a long time to jump from a spaceship to re-entry, possibly months. Therefore, space jumpers need to be equipped with life support systems. In addition, during the descent of the orbit, he also needs to avoid other orbital spacecraft or space junk.

Collide. In short, the end result of jumping from space is likely to be a meteor across the sky.

This is just in case, to prevent the spread of mutant bacteria. Because the spacecraft will be exposed to all kinds of cosmic ray radiation in the sky. This radiation can cause mutations to living beings.

Elephants often bring some seeds to take advantage of this property. In some cases, very productive super "space crops" are grown. Then I am afraid that in case any of the bacteria in the spaceship also produce this mutation and become "space bacteria".

If it spreads, the consequences will be unimaginable. So isolate for a while and see.

Upstairs is really nonsense. Adapting to Earth's gravity is as simple as sitting or lying down. Why quarantine?

It is because astronauts are very physically exhausted when they are in space, and they are relatively depleting in health. Therefore, I will choose to isolate and observe for half a month after returning to Earth. It's for the sake of the astronaut's body.

Because there is no gravitational force in space, the astronauts' bodies are also changing, and the isolation and observation for half a month is also to make the body recover faster.

One is that astronauts need to adapt to the gravitational environment of the earth, and the second is that space is a sterile environment, and it is easy to be infected after returning to the earth.

Because only within half a month of isolation and observation can we see whether the human body is abnormal and whether it is suitable for survival in space.

"The muscles of astronauts will atrophy, and the muscles of astronauts with severe osteoporosis will perform tasks in outer space for a long time, and they cannot stand for the first time after returning to the earth, because the muscles of astronauts do not need to overcome gravity in space, and the muscles of the whole body have atrophied, and the loss of muscle mass is about 12. There is also the effect on bone density, and most astronauts suffer from osteoporosis. ”

Astronauts' muscles will atrophy, osteoporosis is severe, and they will not be able to stand for the first time after returning to Earth.

If astronauts return to the earth from space, they will also have certain problems with their bodies, and the impact on the body caused by staying in space for a long time is also very serious, which may lead to a long-term calcium deficiency, and the impact on the body is also very severe.

The reason why astronauts return to Earth and are carried away is because they have lived in a weightless environment for a long time. If an astronaut walks immediately after leaving the capsule, his muscles will atrophy. Astronauts need to properly regulate their bodies and their own minds, and they must also take good care of them.

They're going to be quarantined, and they're going to do some training on the body. Living in weightlessness for so long has come to a normal situation, and they have no way to accept it. <>

When Wang Yaping was out of the cabin, he looked at his daughter with tears in the corners of his eyes, and said to his daughter that the mother who picked the stars was back. A mother who has been away from her child for so long must miss it very much, but mothers also have to hold back tears. The mother first hugged her daughter, and then took out a star from her arms and handed it to her daughter.

Wang Yaping also does not want his child's hopes for himself to be dashed, and he also hopes that his daughter can always believe in herself. Wang Yaping also said in the interview that he did not fulfill the responsibilities of a mother and did not take good care of the children. <>

The astronauts' bodies are relatively weak, because the living environment outside the earth is different from the real life. The environment there is relatively harsh, the body will be affected anytime and anywhere, it looks romantic, but I don't know that there are many dangers. The space station is subject to alternating hot and cold temperatures, and sometimes the temperature can reach 200 °C.

I have to complete all kinds of research on it, so I don't have the stamina to go out of the cabin. They all know that gravity is not going to be able to walk if they are floating in the air all the time. <>

In general, they will have to recuperate for a while after returning home, after all, they have been on the space station for too long. The body is not used to do anything and has no strength, so they can only rely on others to carry them when they cannot stand. They are afraid that they will also expose themselves to another kind of physical injury, so they are reluctant to walk.

Because when they first return to Earth, their bodies will change dramatically, they will be uncomfortable, and they are now in the recovery period, and there are professionals to take care of them every day.