Six Hundred and Fiftieth Return to the Earth

The long-term space life has had a great impact on Ye Han's body. He stayed in the affiliated hospital of the Moon Palace Base for half a month, but his body has only slightly recovered, and he is still far away from returning to health.

There are many people in the expeditionary force who are in a similar situation. For better medical treatment and recovery, Ye Han and other well-recovered personnel are the first to return to the Beiyuezhou base. They will undergo a period of isolation and recovery in Beiyuezhou.

It has been more than half a century since Gagarin entered space, and mankind has already summed up a complete set of space recovery plans. However, the expeditionary force has been in weightlessness for too long. Even after injecting hibernin, a series of physiological changes will still inevitably occur in the body.

Moreover, each person's situation is different, and they must be treated separately and treated differently, so as to obtain the best recovery effect by the most scientific means.

Long-term weightlessness is too harmful to the human body. The military has begun to consider adopting a rotating structure on new warships to generate a certain gravity with centrifugal force to prevent the crew from being in a state of weightlessness for a long time.

This kind of spaceship often appears in sci-fi movies, and it is not difficult to use it for civilian spaceships, but it is not a small challenge to use it on warships.

Both China and the United States hope to study real artificial gravity as soon as possible. However, although humans have discovered gravitational waves, artificial gravity is still an unattainable and unrealistic goal until there is a breakthrough in the basic theory of relativity.

If there is any hope, no matter how illusory, countries dare to spend money on research. However, the current situation is that they don’t know where to start, and there is no research direction. No matter how much money is spent, it is useless. The status quo is slowly accumulating.

This is really an embarrassing situation, and many people have expressed the same emotion: How wonderful it would be if Einstein completed the grand unified theory!

Beiyue Continent also has a laboratory for the study of artificial gravity, but unfortunately there is no other direction for research other than playing with magnetic levitation.

After another half a month, Ye Han and others have adapted to the gravity of the moon and no longer affect their daily life. The group of people who have recovered the best have received a notification from the base: Get ready to return to the earth and leave on time at 9:00 tomorrow !

This news is really surprising. Ye Han only thought it was over on the moon to recover for a while, but he never thought that he would send everyone back to the earth to recuperate.

Think about it, too. In the past, the cost of rocket launch was high, and anyone returning to the earth once meant wasting a lot of resources. Now that the electromagnetic orbit is put into use, the cost of spaceflight has been greatly reduced, and the country can fully afford the cost of personnel exchanges.

And after some understanding, I found out that the military has just issued a series of regulations for outer space not long ago. Among them, the personnel regulations stipulate that after working in low-gravity environments such as Beiyuezhou and Yuegong Base for one year, the space fleet After working in a weightless environment for half a year, you can return to the ground for one to two months of recuperation. In special circumstances, the recuperation period can be extended appropriately, or until the personnel recover.

It has been two and a half years since Ye Han left. According to regulations, he can enjoy up to four months of recuperation leave. The only people who enjoy the same treatment are those who escaped from the moon with him on the same boat.

Ye Han hoped that Bai Xiaoting could accompany him back to Earth, but if Bai Xiaoting left, he would leave Professor Qin alone on the moon. Although Bai Xiaoting was reluctant to part with her long-lost husband, she finally chose to stay on the moon.

In her own words, it is not too late to return to Earth when she has a child.

The need to return to the earth to give birth is also one aspect of space security. Animal experiments have found that animals cannot conceive normally in a zero-gravity environment. Although it can be done in a low-gravity environment, low gravity can also cause a series of physiological changes. The unborn fetus has various problems such as frailty and sickness, excessive growth rate and so on.

Due to physical problems, once such children grow up and return to the earth, their bodies cannot adapt to the standard gravity environment, and may even endanger their lives. In a sense, the children born on the moon will become the first generation of real Moon people, moon people who can no longer return to Earth.

In the same country and the same nation, there are two populations of earth people and moon people, which is of no benefit to the country, and may even plant the root cause of division, leading to a complete separation of the moon and the earth one day in the future.

Based on humanity and tradition, and in order to prevent the emergence of lunar people, it is absolutely necessary for the country to prevent problems before they happen.

After a long military career, Ye Han has no fixed home, let alone much personal property. After receiving the notice, he simply cleaned up, and the next day he and more than a hundred companions boarded and left Beiyuezhou. spaceship.

After the spacecraft lifts off, it docks with the Moon Palace base, and then takes a passenger flight provided by the military to fly to the earth—in view of the distance between the earth and the moon, even a nuclear-powered spacecraft will take two to three days to reach the moon. The passenger spaceship between the Moon Palace and the Heavenly Palace was designed with the ocean liner as a reference at the beginning, instead of just sending a transport spaceship to deal with it.

Two days later, the spacecraft flew near Tiangong.

Tiangong is no longer the ordinary space station it was at the beginning, but it still stays at an altitude of more than 400 kilometers.

Tiangong is larger than Yuegong, and it rotates at a slightly faster speed. The gravity produced is equivalent to a quarter of the standard gravity. The parking area of ​​the spacecraft is located in the center of Tiangong, where the rotation speed is slow and the centrifugal force is relatively low. Easy to take off and land.

Landing on the Tiangong is very interesting. The spacecraft must use the bow to align with the axis of rotation of the base, and then use the engine to drive the spacecraft, and the stationery spacecraft will also rotate until the rotation speed of the spacecraft is consistent with the speed of the axis of the base.

At this time, if you look at the base from the spaceship, the base will no longer keep spinning, but will remain relatively still. After this step is achieved, the spaceship can approach the base. After flying into the airport and being grasped by mechanical equipment, the spaceship will be dragged to berth The position is fixed, and the landing procedure of the spacecraft is completed.

Conversely, when the spacecraft leaves the port, it must also start from the axis position, otherwise it may collide with the Tiangong base due to operational errors.

The Tiangong base sounds grand, but the technology and materials used to build the Tiangong are not out of date with this era. If a spaceship with a displacement of hundreds or thousands of tons hits hard, it will not die or be disabled.

Since the height of Tiangong is not in the geosynchronous orbit, the "passengers" who arrive at Tiangong must wait patiently for Tiangong to return to the sky of the motherland, and then they can board the return spacecraft and embark on the journey back to the ground.

When Ye Han and others arrived at the Tiangong base, it would take 40 minutes for the base to return to the sky above the South China Sea, but everyone failed to stay in the base for a while, and immediately entered the ground-to-air spacecraft under the organization of the staff, and after fastening their seat belts Slowly wait for the time to leave.

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