Ye Yanyu still took the initiative to apply to return to the space station again.

With the central computer and the computers of the various cabins and the operating system fully integrated. Plus the reasons for the physical health of astronauts. The number of space station guards is decreasing, from a maximum of nearly 200 to about 80. These people have been completing the refinement of the space factory and the installation of equipment and the construction of the life cycle system of the space station.

The Central Academy of Sciences soon learned that it was impossible to completely isolate living things, because the human body itself has a biological environment. Even if the biological oxygen chamber is isolated, can the living space of the person be isolated from contact with anyone?

So after the cabin air circulation system and testing equipment are installed. The crew simply retained the air purification system for recovery and filtration, and did not need to sterilize. Because you can't kill it, you can't kill it.

All that can be done is to bring the astronauts and the creatures above them back to Earth on a regular basis.

After the release, the astronauts planted plants in their small rooms, and the animals were not yet ready to be raised. Even the cockpit and control compartment have some green.

A very common phenomenon of space plants is that the leaves grow more and the stems grow less. It is not easy to reproduce because the wind provided by the station's air circulation system and the wind on Earth make the movement of fine particles significantly different. Even manual pollination is very difficult, and of course it is not easy to produce fruit.

It has been suggested that vegetables and wheat could be grown in biotanks. However, the Central Academy of Sciences decided to put it on hold, and wanted to cultivate the station's basic biome before proceeding to the next step. Among them, algae and ferns are being rapidly screened. The same goes for the microorganisms that accompany them, a large number of dead plants. Waste products from microbial and human metabolism are directly made into fine particles that are filled into the middle of the glass mesh. It becomes the soil for the growth of plants.

More than 3,000 low-level biomes of different series have entered the biological chamber, with a total number of tens of thousands, but less than one percent actually survived. However, they are also producing some variants of their own. The enclosure of the industrial cabin has been fully produced and assembled.

Astronauts suggest that the current biocapsule is too small, only two-ninths of the other parts. They want to use the remaining space junk to create a complete capsule, so that the entire space station is like a big cigar, with its head facing the sun, and the complete and unified capsule also makes the protection of the electromagnetic shield relatively small.

The space station already has ten teardrop-shaped space shuttles that specialize in space towing missions.

Space scavengers, in fact. Their mission is to recover all the space junk. It can also be used as a return capsule when it is critical.

The former re-entry capsule has now been replaced by a re-entry capsule. There are a total of forty return capsules throughout the space station. Able to send 200 astronauts back to Earth at once. Most of these re-entry pods are docked with newly constructed living pods. However, there are emergency return spaces in other functional sections.

The flight deck outside the cargo yard has been demolished. Instead, a new hangar and docking port for ten space shuttles was built. Directly connected to the yard. Because the astronauts decided that the large hangar and flight deck designed were not suitable at all, it would be better to dock directly with the cargo yard.

If there are air-to-ground shuttles in the future, large hangars can be built to dock with the biological cabin, and the reason why it is necessary to dock with the hangar instead of directly. Because the hangar has auxiliary docking equipment. The shuttle was towed, and the fuel tank shell and so on were suspended above the freight yard. Fix with a manipulator. Laser cutting machine automatic cutting. It is then sent to the cargo yard for dismantling, sorting and recycling by astronauts.

The detection matrix composed of more than 1,000 optical and multi-band microwave detection equipment distributed in the shell of the space station has a powerful detection ability, and it depends on whether your central computer can analyze and synthesize them all. From the standpoint. And any space junk that can escape its detection. The accuracy is down to the centimeter level. This accuracy is not that of the probing device, but of the processing of a central computer program. So there's still a lot of room for improvement, and there's no problem in reaching the millimeter level in the end.

In addition to directing shuttles to search for space junk, the system can also provide a data link for space evasion of meteorites and possible attacks.

The evasion action is done by a redistributed and installed attitude control engine. Because of the large number of such engines, they are also assisted by a central computer.

However, this has not happened since the operation, and the observed meteorites have been pulled away by the Moon and the Earth.

On the outer shell of the command module, a layer of skin has been laid, which is what the Institute of Life calls the space material invasion reaction material. Also known as a reaction computer. Its biggest advantage is that it can convert chemical reactions into ordinary signals, dock with a central computer, and form an image to obtain a clear situation of space material invading the space station.

It is an experimental material with a limited lifespan, troublesome disassembly, and difficult to recycle. Improvements are also needed.

The space station has really detected atoms and molecules hitting the skin, but very rarely. There are even one water molecule among them, and even if there is only one water molecule, it proves that the water on Earth is really replenished by the water molecules of space.

A vacuum is not really a vacuum, but the atoms and molecules in it are extremely rare. And there is no shortage of high-energy particles in the universe. They come like a tidal wave, mostly from the sun. But there are also other directions.

When Ye Yanyu told this, he said that he hoped Zhang Chun could help him. He also wants to go up to work, there are too many things there to worry about.

Ye Yanyu already knew the identities of Zhang Chun and his wife.

In fact, the people who went to Dongshuiya to listen to the class at noon began to have some adults. Most of them are asking questions, and there are not many people like Ye Yanyu who talk about themselves endlessly, and these things can be seen on TV and computers, which is not a secret. It's like many people here know who this ranger in Dongshuiya is, but no one has broken it. Ye Yanyu also knew what to say and what not to say.

His body is technically very healthy, still the standard of the Darkmoon, and he is also very young. However, some of the balance in his body was broken, and two months was not enough time for him to recover. The estimated time given by the Life Institute is three months. He couldn't wait.

Everyone didn't speak, listening to him, even Zhang Chun's eyes changed from tolerance at the beginning to respect.

Lizhi gently touched Zhang Chun before he came back to his senses. He already understood that Ye Yanyu was a soldier and a scientist, and he would not disobey orders, nor would he not fail to understand the significance of the institute asking him to wait for three months. So he just can't say this in front of ordinary people.

He already knew that the people who came to Dongshuiya were all people who were about the same as him, and some of them might be even more important than him, not to mention that they were all children and scattered adults. Therefore, confiding and listening is what he needs, and it is also the best way to relieve his psychology.

"Is it possible that the space station has encountered a large enough ice core. It carries life on it. ”

Zhang Chun asked casually.

"Anything is possible because some microorganisms are dormant under extreme conditions. But the ice core that freezes it needs to be large enough, otherwise it will be lost in space. And ice alone can't stop high-energy particles from penetrating. Due to various conditions, the probability of encountering it is too small, and it may not be met once in decades or hundreds of years. In fact, this also involves the safety of the space station, in addition to the electromagnetic shield, a larger solid protective shield is also needed, and perhaps in the future, there will be enough materials to build such a larger shell. The main thing is to protect some tiny meteorites, and the large ones that can be detected can only be evaded. ”

Ye Yanyu spoke more and more relaxed.

"Yes, but decades are nothing to Earth. One or two atoms are indeed too few for the space station, but for the earth, it may be that they are absorbed. Zhang Chun nodded.

"What Sir is saying is that when we look at the nebula, we find that it is actually composed of gas or fine particles. Its density is probably smaller than that of the Milky Way, which we now call a vacuum. It's only because it's far away that you can see it. This means that when our spacecraft passes through the nebula, we may not feel anything. But it is these nebulae that form the stars. The universe is not dead, but alive, constantly evolving. ”

"Yes, both macro and micro. For some tiny particles, our body is also a substance that is so thin that it cannot be felt, and when they pass through our body, they are not blocked at all. We feel clean when we take a bath, but in fact, our bodies are infested with many microorganisms, and our bodies are equivalent to their earth. It sounds scary, but it's the norm. ”

"Sir, what you say is disgusting." A bunch of children were making a fuss.

Zhang Chun smiled and said, "It's disgusting, but it's a fact. Understanding this fact may change a lot of our understanding. (To be continued......)