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Tessie is too greasy
Tessie is too greasy
As we all know, astronauts are great jobs, and they carry out particularly difficult missions on behalf of mankind, not only for personal dreams and honor, but also to promote human understanding and development of the universe.
With such a difficult task on their shoulders, each astronaut is one in a million, and from the 10,000 candidates, both mentally and physically, they are destined to be extraordinary.
Shenzhou-17 took off on October 26, 2023, and three astronauts, Tang Hongbo, Tang Shengjie and Jiang Xinlin, took the spacecraft to outer space.
The main tasks of this six-month space "business trip" are: to carry out on-orbit experiments with space science and application payloads, to complete the in-orbit rotation with the Shenzhou-16 crew, and to carry out the maintenance and repair of the space station.
Now the three-astronauts' six-month "business trip" is nearing completion, and it is reported that they will return to Earth on April 30.
According to the previous return of Shenzhou 16 to Earth, after the three astronauts of Shenzhou 17 returned to land soon after, they must also be carried away on a stretcher, and then quarantined for a period of time.
Such a situation is not a special case, as long as netizens who are a little concerned about the aerospace industry basically know that these are necessary operations for astronauts to return to Earth.
Although I know, there are still netizens who wonder why astronauts must be quarantined when they return to Earth, and what is the reason behind this?
Why do I need to quarantine?
First of all, the astronauts are quarantined after returning to prevent the spread of new infectious diseases for the sake of their own safety and those around them.
The space capsule is actually a closed environment, and the air system inside is also closed, which needs to be repeatedly filtered and circulated to remove carbon dioxide and provide the astronauts with the oxygen they need.
Even if the air in the capsule is purified, but these are still not enough, the natural fresh air we usually live in, and the closed system of the space capsule may also breed microorganisms.
In addition, there are many kinds of radiation in the universe, and viruses and bacteria may undergo genetic mutations in the environment of various types of radiation in space, and eventually produce new types of germs and new infectious diseases.
Although this is extremely unlikely and has not happened until now, there is nothing wrong with quarantine protection.
In addition to preventing the occurrence of new infectious diseases, the astronauts will be quarantined after returning to Earth, which is also important for the astronauts themselves.
The first is the influence of microgravity, as we all know, the earth has gravity, but space does not, it is a weightless environment, astronauts can float at will in space.
The time for astronauts to go on a "business trip" to outer space is not short, a few months, and long-term exposure to this weightless environment will affect the astronaut's blood circulation and lymphatic circulation.
Even, the immune system in the astronaut's body will change, and the immune system may be lazy and become weak.
Each of us living on the earth actually carries germs in our bodies, and it is precisely because of the body's immune system that they will not affect our health, but astronauts are different, after returning to the earth, the immune system is fragile, and ordinary germs may bring them fatal damage.
In addition, there is the effect of radiation from outer space, which may affect the bones of astronauts, which may make their bones thinner, and the degeneration of bones will reduce the pressure on the weight-bearing bones of the human body's lower limbs and spine.
And in space, due to the influence of gravity, astronauts will also exercise less, which will also cause their muscles to deteriorate, and muscle atrophy may be difficult to maintain balance on daily standing.
Therefore, when the astronauts return to Earth, for this reason, they will also be carried on stretchers, and the quarantine is also to help the astronauts exercise and recover their original physical functions as soon as possible.
Astronauts are on a long "business trip" in space, which is necessary for physical changes, which can also see why the selection of astronauts will be extremely strict, and they must have good physical and psychological quality.
In addition to helping them recover, returning to the ground for isolation is also to prevent and timely cope with any discomfort in the astronauts' bodies after they return.
The quarantine period after the astronauts return is about half a year, which is also divided into three different stages.
There are three distinct phases of the quarantine period
First of all, it is necessary to carry out a medical isolation period, and the astronauts will have to undergo a medical isolation device for about three weeks to four weeks, and this is also carried out with reference to the three-level isolation system. During this period, the astronauts were not able to communicate with the outside world, and they were basically isolated from the outside world.
During this period, the astronauts will have plenty of time to rest, and their daily nutritious diet will be fully supplemented, and then they will start to do moderate upper limb training to improve blood circulation.
They also need to re-adjust to the gravity of the earth, and they will also receive some gradual methods such as massage to help their bodies recover slowly.
Secondly, it is necessary to undergo a medical recuperation period, the second stage is about 20 days or a month, at this time, the astronaut will move into a sanatorium in order to better recover his health.
During this period, the astronauts' daily training activities will also be gradually increased.
Finally, there is the recovery period, the third stage takes the longest, about three months, during which the astronauts have to return to their previous normal physical condition as much as possible.
In the final stage, if the astronauts can return to their normal physical level in advance, then they can also start to return to their normal daily training.
epilogue
The entire isolation period of astronauts is basically about half a year, for the dream of the country and mankind, the astronauts have made great efforts, not only to receive high-intensity and rigorous training before going to space, but also to carry out a period of isolation work after returning.
This job is not easy and great, the pressure on their hearts and bodies is also unimaginable, and finally I hope that the astronauts are in good health, and I also wish the motherland's aerospace industry more and more smooth!
Resources:
People's Information, September 17, 2021 -- Why should the "space business trip trio" be quarantined when they return to Earth? Will there be a "space reaction"?
People's Information, April 22, 2022 -- Astronauts also have to be quarantined?
XINHUA, April 24, 2024 (Xinhua) -- The Shenzhou-17 astronaut crew will return to the Dongfeng landing site on April 30
People's Information, September 18, 2021 -- Astronauts have to go through three stages from returning from space to normal training and life