According to the China Manned Space Office:
After about 7.5 hours of out-of-cabin activities, astronauts Tang Hongbo, Tang Shengjie and Jiang Xinlin worked closely with the cooperation and support of the space station's robotic arm and ground scientific researchers to complete the established tasks such as the solar wing repair test of the Tianhe core module.
And this mission also refreshed the new history of mainland aerospace.
Among them, Tang Hongbo, the first astronaut in the mainland to return to the space station, walked in space again after two years, and astronaut Tang Shengjie became the youngest astronaut known to the mainland to carry out the mission out of the cabin, which can indeed be regarded as writing the history of the mainland's aerospace.
However, many people have also noticed a problem, that is, why do Chinese astronauts go out of the capsule for no more than 8 hours each time?
Let's take a look at the situation of astronauts leaving the capsule.
China's space station was hit! The Shenzhou-17 astronauts repaired it once
That's right, the impact of the Chinese space station is no longer an abnormal thing, and it has been explained to everyone many times that there is no way to avoid it.
Because with the enhancement of human spacecraft launches, more and more space junk is piled up in space, and the trend is increasing, and spacecraft that are active in space are also easy to be hit.
China's space station is one of the spacecraft hit by space junk during its long-term operation, and the International Space Station has also appeared. Although the solar wing of the continental space station was hit, it did not have a great impact, and the spacecraft is still in stable operation, so there is no need to worry.
And this time, the mainland Shenzhou 17 astronauts also went out of the capsule for maintenance, so there is no problem, and this time the improvement of technical strength can be regarded as providing a guarantee for the implementation of the mainland's future space station mission.
Because this time the astronauts have learned Xi "actual combat" experience, they can directly complete it when they encounter the same problem in the future.
Especially after the upgrade of China's space station, from three to six cabins, the Chinese space station will be more likely to encounter this problem, because the Chinese space station has become larger, so the probability of receiving space junk has also increased.
Then after the Shenzhou 17 astronauts carry out this mission, they can explain the actual combat experience to other batches of astronauts, and then learn Xi, and it will not be a problem to encounter these problems in the future.
At the same time, according to the plan, a large number of scientific experiments and technical tests will be carried out during the Shenzhou 17 manned mission, as well as a number of astronaut crew out-of-cabin activities and application payload out-of-cabin missions, which are initially expected to return around April 2024, which is also the moment when the astronauts of the mainland Shenzhou-18 manned spacecraft enter the space station, which is the basic situation.
So why didn't astronauts get out of the capsule for more than eight hours? That's good enough
As everyone knows, in fact, not only did the Shenzhou 17 astronauts leave the capsule for more than 8 hours, but in fact, other Shenzhou manned spacecraft missions on the mainland were almost never seen when they were out of the capsule.
The reason behind this is not that there are problems with the astronauts' physical strength and training strength, which is not a big deal for mainland astronauts, and the most critical problem is actually the problem of the mainland spacesuit.
When astronauts leave the capsule, it is a very dangerous and difficult task to get out of the capsule because of the lack of bulkhead protection, and the astronauts face complex and variable temperature, pressure and radiation outside the capsule.
Without the protection of extravehicular spacesuits, the lives of astronauts would be threatened.
It can be seen that the Shenzhou 17 astronauts are also facing these problems when they go out of the capsule, which once again emphasizes one thing, that is, every mission of the astronauts out of the capsule is really the "highest risk" time, and it is also the most nervous time in the entire mission.
Therefore, the extravehicular spacesuit is the central point of safety assurance, which also determines the time when the astronaut can go out of the capsule. China's extravehicular spacesuit can provide astronauts with the necessary conditions such as oxygen, temperature, pressure, and communication, and can also protect astronauts from various dangers in space, such as rays, high-energy particles, space debris, etc.
However, it is also because of the existence of these problems that it also determines the time for Chinese astronauts to appear outside the capsule, and if they encounter an emergency, they also need to return to the capsule urgently.
This time, the Shenzhou 17 astronauts should not have encountered any problems, and the mainland had encountered them before during the Shenzhou 12 mission, so it is not that there are none, but many people may not know. Then why did the astronauts go out of the capsule for no more than 8 hours?
The main reason may be the support of the continental extravehicular spacesuit, the mainland's second-generation "Feitian" extravehicular spacesuit, which belongs to the mainland's upgraded version of the spacesuit, although it has been further improved and optimized, so that its cost is 30 million yuan on the basis of the number of reuse increased to 15 times, but each working time, it is only increased to about 8 hours, so this time is limited.
But this is good enough, although the cost of the mainland's first-generation "Feitian" extravehicular spacesuit is as high as more than 30 million, it can only repeat 5 extravehicular activities, and each time can only support 4 hours.
See, the mainland has upgraded its extravehicular spacesuit step by step, but there is still a limit on the time to get out of the cabin, not that it comes at will, and the mainland may spend a longer time in extravehicular activities after further upgrades in the future, and this is the approximate situation.
Of course, again, the extravehicular spacesuit is not the only factor
As I told you above, there are other factors in it, so if there is a better extravehicular spacesuit in the future, it needs better conditions to support it.
Because getting out of the cabin is a mission that can be affected in many ways.
Therefore, the extravehicular spacesuit is not the only factor, it can only be said that when all conditions are met, it is part of the factor, and this is the general situation.
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