On June 17, 2021, Nie Haisheng, Liu Boming, and Tang Hongbo boarded the Shenzhou XII spacecraft and entered the Tiangong space station, flew in orbit for 90 days, and completed the task of staying astronauts on China's space station for a long time.
Space is a place of microgravity, weak fields, and high radiation. Staying in space for a short time may not have a significant impact on the body, but up to three months is bound to have a greater impact on the body.
The first effect is osteoporosis. Because there is no gravitational force, bones will be divergent.
On the space station, due to the microgravity environment, the phenomenon of reverse flow of human body fluids will occur. Therefore, we must strengthen exercise to make up for the bad effects of losing gravity.
This was the way Nie Haisheng, Liu Boming, and Tang Hongbo had just set out
And this is what the three astronauts looked like after living on the space station for a while.
At first glance, I thought that the food on the space station was too good, and everyone had gained weight. In fact, this is the phenomenon of microgravity puffiness. Because the body is not affected by top-down gravity, the cellular tissue will more or less diverge around. So the whole person looks like he's getting fat.
Why do astronauts still have to quarantine after returning to Earth, and is there a new crown in outer space?
In fact, astronauts returning to Earth for isolation is called medical isolation, not because of the new crown, this is the normal isolation.
Our astronauts will be back tomorrow, and when they come back, they need to undergo first 14 days of medical isolation, then 20-30 days of medical recuperation, and finally another 3 months of physical recovery.
Because of the long-term adaptation to the space environment, the first effect is muscle atrophy, back to the earth can not stand up, just like the previous astronauts, just back to the earth also need to carry the seat, this is not to give the astronaut noble glory, but you do not carry the astronaut, he may not be able to stand, let alone walk by himself.
Wang Yaping had been stationed in Tiangong-1 for only 15 days on Shenzhou 10, and there were problems standing when he came back, not to mention that this time, China's three astronauts lived in outer space for 3 months.
Secondly, long-term life in space can lead to physical weakness and the need for medical recuperation.
The key is to prevent the viruses brought back from space by astronauts from ravaging The Earth.
The 14-day medical quarantine is exactly the same as the number of days of COVID-19 quarantine, so it can be mistaken for the new coronavirus quarantine. In fact, it is not, the new crown virus is not strong enough to survive in space. This quarantine is to prevent space viruses.
<h1 class="pgc-h-arrow-right" > outer space is not a vacuum? Why is there a virus</h1>
In the complete universe, viruses and bacteria cannot survive, after all, the high radiation and various rays of the universe will cause all genetic base pairs to be inactivated.
First of all, the altitude of the International Space Station is 400 kilometers. Our space station is slightly higher, about 400-450 km above sea level. Such a height is not a complete vacuum, and there is also thin air, such a height can allow microorganisms to survive.
In 2013, European astronauts also brought tardigrades to outer space, exposing them to oxygen-starved, weightless, high-radiation outer space for 10 days.
As a result, tardigrades still live well, and breeding offspring has no effect.
Viruses that can live in outer space have basically mutated, they can withstand harsh environments in space, and once they return to such a gentle village on the surface of the earth, they will not become overlords. This is still a great harm to human beings. Therefore, astronauts must be isolated for 14 days to observe, to prevent space viruses from affecting society.