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"You're doing a great job!" Yuan Haochen smiled and praised, "With the continuous development of lunar resources, when the trial production stage is over, we must further expand production, so that the collection of lunar resources will gradually move towards mass production." Although, for the sake of the apocalyptic crisis, we will not consider stationing on the moon for a long time. However, for short-term goals, it is still necessary to build a simple lunar storage warehouse. ”

"Okay, the construction of the lunar reserve warehouse will be on the agenda soon." The head of the fleet, Corion, replied.

"You can refer to the first phase of the construction plan of the Mars base." Yuan Haochen suggested.

"Understood." Crane smiled and said, "I'm sure we'll be hollowing out the moon's resources soon!" ”

"Haha~" Yuan Haochen looked at Corian and smiled knowingly and said, "That's not good, if you hollow out the moon and the moon's orbit changes, people on the earth who enjoy the moonscape will have opinions about us!" ”

"Our exploitation of the lunar mineral resources is an attempt and a drill, and we are preparing for the wandering stage of the future space city. Only through the test and tempering of practice can we build a powerful deep space resource development fleet! Go for it! Yuan Haochen said meaningfully.

"You're right!" Corion said earnestly.

"Let's go take a look at the other groups." Yuan Haochen made a request.

"So, let's go to Team D, who are mainly responsible for collecting the fusion fuel helium-3." The head of the fleet, Corion, suggested.

"Just go to Group D!!"

"Okay."

It is true that the moon contains a large amount of silicon, iron, aluminum, titanium, calcium, oxygen and other elements, but these elements are actually enough for human use on the earth, and mining them is not a priority.

Earth's civilization has mastered controlled nuclear fusion technology, and the nuclear fusion reaction using deuterium and helium-3 can be used as an energy source for nuclear power plants, which produces no neutrons, no radiation and no nuclear waste, and is safe and pollution-free. The nuclear fusion power station can provide powerful power support for the geocentric city and the space city.

However, helium is very scarce on Earth, especially helium-3 (which can also be synthesized in the laboratory), which is an energy source that is not available on Earth. Scientists speculate that the reserves of helium-3 are only 500 kilograms at most on the entire planet, but on the moon there are 70 kilograms per square kilometer.

Helium-3 was initially formed as a result of the Sun's thermonuclear reactions, and then dispersed in all directions by the solar wind. Of these, only a small amount can reach the Earth and other planets. Because there is an atmosphere and magnetosphere obstruction. They are very difficult to land on the surface of rock formations. The Moon does not have an atmosphere, so particles carried by the solar wind can easily fall on the Moon.

It is estimated that the amount of helium-3 in lunar soil is about 715,000 tons. Judging from the current situation, due to the huge reserves of helium-3 on the moon, it is undoubtedly a relief for the earth civilization that is in crisis.

The spaceship that Yuan Haochen was on soon flew to the [Cold Sea] area where Team D was located.

"The total amount of helium-3 extracted from the moon is enough to meet the energy needs of the entire planet for 400 years. According to preliminary surveys, the content of helium-3 in the [Cold Sea] area here is particularly high. Captain Cryan introduced.

"The construction of a 500-megawatt deuterium-helium-3 fusion power plant will require about 50 kilograms of helium-3 per year. In other words, we only need to dig a pit on the lunar surface every year with an area of 1.5 square kilometers and a depth of 3 meters. It can meet the needs of the nuclear fusion power station for one year. ”

"Importantly, this upheaval reaction is radioactive and produces more energy. Using helium-3 as a feedstock, the cost of a nuclear reactor can be reduced by at least half. Such a model is very suitable for the development of the space city. Yuan Haochen added.

"It's a pity!" Yuan Haochen looked at the collection robots that were busy back and forth, and said with emotion, "If it weren't for the sudden attack of gamma-ray bursts, maybe we would have been making long-term plans to build a lunar base." The moon base, like the Mars base, may become an important stop for human survival beyond the earth. ”

......

Half a year later, in March 2084.

It has been 115 years since Soviet scientist Sakharev observed that anomalous supernova explosion, the first year of the crisis, 1969.

Although human civilization has come a long way in the fight against the gamma-ray burst crisis, it has also made certain achievements.

As of that month, the actual progress of human civilization is as follows.

Geocentric City Construction Goals:

A total of 200 [geocentric cities] have been completed (the total construction target is 2,000), and a total of 200 million people have lived in underground cities, which is still 90% short of the upper limit of 2 billion people;

Among them, the construction progress of major countries is as follows: 21 in China, 18 in the United States, 15 in Russia, 6 in Japan, 6 in India, 5 in Germany, 4 in the United Kingdom, and 4 in France......

Interstellar Migration Program:

There are 5 space cities that have been built, and there is still a big gap between them and the goal. (The total number of space cities built in 10 years is 300, the total number of space cities built in 20 years is 600, and the total number of space cities built in 30 years is 800.) ）

The construction of 2 new space docks has been completed, for a total of 5.

Among them, the No. 1, No. 2, No. 3, and No. 4 space docks are responsible for the construction of the space city, and the No. 5 space dock is responsible for the construction of deep space resource development spacecraft and escort warships.

......

At the headquarters of the Interstellar Exploration Alliance, in the office of the commander-in-chief.

Yuan Haochen and the commander-in-chief sat opposite each other, discussing something.

"Hao Chen, the development project of lunar minerals has achieved good results, which has had a positive impact on public opinion. It has also made more and more people see the importance of the interstellar immigration project. The commander-in-chief said pleasantly.

"It's really exciting. Space City and [Geocentric City] should have formed a form of complementarity and mutual assistance. Whether it's the inhabitants of Space City or the City of the Earth. will all be an important part of the [post-earth civilization], and all of them are indispensable. Only by eliminating estrangement, sharing weal and woe, and pooling wisdom and efforts, can all mankind successfully overcome the difficulties. Yuan Haochen replied.

"You're right, so, keep up the good work! If you encounter a difficult bone, tell me in time, and I will try my best to help you solve it. Said the commander-in-chief.

"Thank you, Commander-in-Chief." Yuan Haochen continued with regret on his face, "At present, it takes too much time due to the preliminary infrastructure construction. Moreover, the team of engineers is still inexperienced and unskilled, and the construction progress of the space city is already far behind schedule. Rest assured, though, we're confident we'll meet our goals on time! ”

"Everything is difficult at the beginning, and before the advanced science and technology of the Creator that you discovered reached the earth, the construction of the [City of the Earth's Center] also encountered many challenges in the early stage. I believe that the construction progress of the space city will definitely catch up. The commander-in-chief encouraged.

"Thank you, Commander-in-Chief, for your encouragement!" Yuan Haochen said.

(To be continued.) )