The long-term space life has had a great impact on Ye Han's body, he has lived in the Affiliated Hospital of the Moon Palace Base for half a month, and his body has only recovered slightly, and he is still far from recovering his health. Pen ~ fun ~ pavilion www.biquge.info

In order to provide better medical treatment and recovery, Ye Han and other personnel who have recovered well will return to the Beiyuezhou base in the first batch, and they will be isolated and recovered in Beiyuezhou for a period of time.

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, but the expeditionary force has been in weightlessness for too long, and even if hibernation is injected, a series of physiological changes in the body are still inevitable.

And everyone's situation is different, and it must be treated separately and differently, so as to obtain the best recovery effect by the most scientific means.

The damage to the human body caused by long-term weightlessness is too serious, and the military has begun to consider adopting a rotating structure on a new type of warship to generate a certain gravity with centrifugal force to avoid the crew from being in a state of weightlessness for a long time.

This kind of spaceship often appears in science fiction movies, and it is not difficult to use it for civilian spaceships, but it is a big challenge to use it on warships.

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

If there is any hope, even if it is illusory, countries will dare to spend money on research, but the current situation is that they don't know where to start, they don't even have a research direction, and no matter how much money they throw, it is useless to spend more money, so they can only maintain the status quo and accumulate slowly.

This is an embarrassing state of affairs, and many people have expressed the same sentiment: It would be nice if Einstein had completed the theory of grand unification!

There is also a research laboratory in Beiyuezhou that studies artificial gravity, but unfortunately there is no other direction to study except for playing with magnetic levitation.

After another half a month, Ye Han and the others have adapted to the gravitational pull of the moon and no longer affect their daily life, and the group of people who have recovered the best have received a notice from the base again: prepare to return to the earth and leave on time at nine o'clock tomorrow!

This news is really surprising, Ye Han only finished it when he recovered on the moon for a while, and he didn't expect that he would send everyone back to Earth to recuperate.

Think about it, in the past, the cost of rocket launch was high, and anyone returning to the earth once meant wasting a lot of resources, but now the electromagnetic orbit has been put into use, the cost of aerospace has been greatly reduced, and the country can fully afford the cost of personnel exchanges.

Moreover, after some understanding, I learned that the military has just issued a series of regulations for outer space, among which the personnel stipulations stipulate that those who have worked in low-gravity environments such as Beiyuezhou and Yuegong Base for one year, and those who have worked in weightless environments such as the space fleet for half a year, can return to the ground for one to two months to recuperate.

Ye Han has been gone for two and a half years, and according to the regulations, he can enjoy up to four months of recuperation leave, and the only people who enjoy the same treatment are those who escaped from the moon in the same boat with him.

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, but in the end she chose to stay on the moon.

In her own words, it's not too late to return to Earth when she has a baby.

Animal experiments have found that animals can not get pregnant normally in a gravity-free environment, although they can, but low gravity can also cause a series of physiological changes, and the fetus that grows up in a low-gravity environment has problems such as frailty and disease, and the growth rate is too fast.

Due to physical problems, once such a child returns to the earth after growing up, the body cannot adapt to the standard gravity environment, and may even endanger life, in a sense, the child born on the moon will become the first generation of moonmen in the true sense, and can no longer return to the earth.

The emergence of two populations, the earthlings and the moonmen, in the same country and the same nation, is not beneficial to the country, and may even sow the root cause of division, leading to the complete separation of the moon and the earth one day in the future.

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

After a long military career, Ye Han still has no fixed home, let alone much personal property, so after receiving the notice, he simply packed up, and boarded the spaceship leaving Beiyue Zhou with more than a hundred companions the next day.

After the spacecraft lifts off, it docks with the Moon Palace base, and then flies to the Earth on a passenger flight provided by the military -- given the distance between the Earth and the Moon, even a nuclear-powered spacecraft will take two to three days to fly to the Moon, so the passenger spacecraft sailing between the Moon Palace and the Heavenly Palace was designed with an ocean-going passenger liner as a reference, rather than just sending a transport spacecraft to deal with the problem.

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 a little larger than Yuegong, spins slightly faster, and produces gravity equivalent to a quarter of standard gravity, and the spacecraft's berthing area is located in the central area of Tiangong, where the rotation speed is slow, the centrifugal force is relatively low, and the spacecraft is easy to take off and land.

Landing on the Tiangong is interesting, the ship has to align the bow with the rotation axis of the base, and then use the engine to drive the ship, and the stationery ship also rotates until the speed of the ship's rotation is the same as the speed of the base axis.

At this time, look at the base in the spaceship, the base will no longer rotate non-stop, but remain relatively stationary, after reaching this step, the spacecraft can get close to the base, fly into the airport and be grasped by mechanical equipment, and then drag the spacecraft to the parking position to be fixed, and complete the landing procedure of the spacecraft.

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

The Tiangong base sounds lofty, but the technology and materials used to build the Tiangong have not departed from this era, and it has been hit hard by a spaceship with a displacement of hundreds or thousands of tons, and it is not dead or crippled.

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

When Ye Han and the others arrived at the Tiangong base, it would take forty minutes for the base to return to the sky over the South China Sea, but everyone couldn't stay in the base for a while, and immediately entered the ground-to-air spacecraft under the organization of the staff, fastened their seat belts and slowly waited for the opportunity to leave.