In the days when the bearded Gu Song reappeared and began to travel the world with Xie Yinran, HSDA has been holding meetings and discussing.

It wasn't until the end of the year that the HSDA finally reached an agreement.

It is necessary to go, but what if it is true? The earth also wants to struggle for a few hundred years.

As for the fact that there is some kind of risk, then all the people must be prepared to sacrifice for the planet.

In view of the possible risks, we are also prepared for a variety of plans. For example, in the contact step, the flint space city will not enter the distance range stated by the alien creation first, but will have an advance team to take the dragon king.

For example, Gu Song and others, who are more sure, will start to receive "education" and "testing" after confirming their safety.

Such an arrangement has made many countries excited. The greater the risk, the greater the benefit!

Who knows how difficult it will be, what if you pass the test and become a seed sequence?

This martyr must rush to apply!

As for the composition of the staff......

In the end, the 105 members of HSDA were divided into two parts.

The 55 places, allocated by the Academy of Human Sciences, with an upper age limit of no more than 40, are called the "prime-age group".

The remaining 50 were selected from Flint Aerospace University and were called the "Youth Group".

Small countries are helpless, and later large countries are also helpless.

In the Academy of Anthropology, the largest number of people now are naturally those countries that have long been in the group.

In addition to well-known scientists, HSA also has a number of research institutes with master's, doctoral and postdoctoral degrees led by scholars.

And Flint Aerospace University has naturally started a global expansion of enrollment in the 2016 academic year.

An expansion that has the potential to affect the fate of the entire human race.

……

In Changwen's astronaut training center, the people who received the invitation are all training here.

For them, the intensity is not very high.

After all, they won't be weightless all the time, and they won't need to have complicated tasks.

"We're risking our lives to attend his wedding. Tao Xue looked curiously at the scene in the helmet of the spacesuit, and then said to Liu Daqing.

"That guy is very stable, haven't you seen him shrink in the country for so many years, and only now that he has locked Ami in a small black house, he has not gone out to travel?" Liu Daqing took her hand, "Don't worry." ”

"Tut-tut, such a special wedding should be known to the whole world. ”

Liu Daqing glanced at her and said, "Lao Gu said that his wife doesn't like to be stared at by many people. When I went to your house, your enthusiasm and curiosity made her a little embarrassed. ”

Tao Xue raised her head and shook off his hand: "Be cold to you at night, lest you talk about me." I'm going to play with Zhang Xiao to find Miss Xie's best friend!"

After saying that, as soon as he put his hands on the bulkhead of the model, he floated towards Misha.

Seeing this, Deng Yihui also floated over.

"Daqing, Brother Yihui, how do you feel?" asked Bai Yang with a smile in the communication channel.

Liu Daqing calmly felt the state of weightlessness: "Fortunately, after all, in terms of spatial perception, I have already felt it in "Astronaut". Then again, you don't have to train?"

Deng Yihui said: "He estimated that he had already played it 108,000 times. ”

"You have too many questions, I am maintaining the entire training center system on a daily basis, do you think I still need to train?" Bai Yang's voice was very stiff, and then he said excitedly, "Let me tell you, the big guy next to Lao Gu is the one who first moved the computer for us, and he is the commander of the Dragon King." I see that he has been carrying things to Space City lately, as well as wine. Daqing, I think you have to train again for weightlessness after getting drunk. ”

Liu Daqing paused, and then scolded: "Damn! It's too extravagant! It's not going to be a banquet in space? Isn't it just a ceremony?"

"If it's just one ceremony, why bring you here for training?" said Poplar with a smile, "There is artificial gravity in the ring cabin, and it is also a full seat belt in the aerospace plane. It's a rare trip, of course, let you feel the future space life in advance. ”

Deng Yihui looked at Wang Suizhen not far away, and then said: "We don't have many materials that have this opportunity to receive training. Wang Suo also joked, saying that he didn't expect to have the first chance to go to heaven because of his wedding. Extravagance is indeed extravagant, and this is a higher treatment than the legendary Space Black Card Club members. ”

"Forget it, it doesn't matter, after all, there's no point in measuring him with money, let's have a good time. Liu Daqing said, "Little Baiyang, you still make fun of my drinking, and you will have a showdown in the sky!"

……

Wang Peiji and these people are already people whose children are about to grow up, and the circle is more different.

After training, they gathered on the balcony of the apartment, and several people talked about what they cared about.

"Old man at home, did you let you cultivate a 'seed'?"

Huo Yushan listened to his words and said directly: "If Gu Song can really pass the test, he can go with him in the future, my whole family is a seed!"

"You're chic...... Who knows what's in the universe?"

"So there's no need to worry about that now, after all, there is no shadow. I didn't look at Gu Song's own attitude and was very casual, and he didn't really concentrate on preparation? Damn, what excuse did he make for his pre-wedding honeymoon!"

"Hey, I'm under a lot of pressure. I'm so old, and let me continue to have one or two ......"

“…… You were too prodigal when you were young, and now your kidneys are dead, right?"

“…… Roll ......"

……

In space, Fan Yuanbai once again confirmed the detection of each system, and then officially ordered: "Rotate begins! Take your time and pay attention to the pressure reading!"

"20% power, give 10 seconds first!"

Outside the annular scientific research chamber of the flintstone space city, three groups of 12 annular cabin rotating nozzles distributed at the junction of the truss and the passage began to work.

Very gentle thrust builds up gradually.

Huge annular cabin, barely moving.

"The observation is shifted in place, and the current angular velocity is 0.0001 radians per second!"

"The air pressure is normal!"

"Uniform spindle pressure!"

Fan Yuanbai nodded: "Yes, 50% power will be given for another 10 seconds!"

The vent was noticeably stronger, and the circular scientific module began to visibly slow down and begin to spin.

To form an artificial gravity force by the centrifugal force generated by rotation, the threshold required is very high.

To reach an artificial gravity of 1 G by rotation, the radius of the annular cabin is multiplied by the square of the angular velocity. So, either increase the radius of the annular cabin, or increase the angular velocity.

This is not only a matter of the amount of space engineering and the strength of materials, but also one point: human beings are creatures that cannot stand it.

You must know that if the speed that a normal person can withstand exceeds three revolutions per minute, it will be seriously uncomfortable.

So if you do some math, if the radius of the annular cabin is only 15 meters, how much speed does it take to achieve an artificial gravity of 1 G? 1.3 radians per second, 12.4 revolutions in 1 minute.

If there is only such a small radius, then in such an artificial gravity environment, no matter what kind of physical fitness astronauts, one is counted as one, either fainting or vomiting.

This is the high threshold of artificial gravity.

Now, with a radius of 150 meters, if you want to reach the standard gravity of 1 G, its rotation speed needs to reach more than 2 revolutions in 1 minute, which is very exaggerated and can be described as the limit.

As such, it is considered a research and working area, and does not provide a full 1 G gravity in reality.

The living module with a diameter of 500 meters can achieve a standard gravity of 1 G at a speed of less than 2 revolutions in 1 minute, so that people can live more comfortably in it, and will not suffer from calcium loss and various other physical conditions due to long-term weightlessness.

At present, the first thing to test is whether this annular scientific research module can operate stably at an angular velocity of more than 0.25 radians per second.

That's the standard speed at which it reaches 1 G.

In normal conditions, it can maintain 0.4 G.

"0.21 arcans per second, the speed has exceeded 2 revolutions per minute!"

"Uniform spindle pressure!"

Fan Yuanbai nodded: "Go to 1 G and keep it for 1 hour." Drop it to 0.4 G for another 12 hours. Pay attention to adjust the power according to the resistance. ”

Right now, for ease of construction, the Flint Space City is still in low-Earth orbit, and although the air is extremely thin, it will still have a faint impact.

The work of space is to calculate the impact of every drop.

……

On the ground, Flintstone Space City has become a very easily observable star in the sky.

And after the announcement of the alien creation enlightenment plan, the historical significance of the flint space city has been even higher.

Whenever the flint space city flew over different areas, the local astronomy enthusiasts would always move out of the astronomical telescope and chase the trail of the flint space city.

On this day, many places corroborated each other's observations and compared the pictures they took.

Soon, people on the Internet began to run to tell each other: the annular cabin of the flint space city began to rotate!