Not long after the Expeditionary Fleet returned to Earth.

The Supreme Council of Humanity has launched a secret plan.

Some students from the military research class and scientists from scientific research departments such as the Academy of Military Sciences participated.

Among them, Lang Xiaonian is the head of the military research team.

"Why is Xiao Siyan the person in charge for opening a mine such an important task? I don't agree!" Niu Dazhi was immediately dissatisfied when he heard that he wanted to listen to Lang Xiaonian's arrangements.

"Xiao Nian, let's kick him out of the secret planning group." Eve encouraged him.

"Brother Dazhi, this secret plan is related to astronomy. I am the representative of the class. My father is in charge of the Academy of Military Sciences. It is easier to get in touch with it." Lang Xiaonian explained.

When Niu Dazhi heard this, he laughed and patted Lang Xiaonian on the shoulder and said, "Xiaonian, I am absolutely confident in your achievements in astronomy. I hope you and do it well."

As soon as he finished speaking, he was suddenly flew out with one hand and hit the wall.

"Everyone is sitting down, the professor is ready to distribute 10% of the computing power to participate in the discussion of this secret plan." Fang Yuan slapped Fei Niu Dazhi in the face, let everyone sit down, and officially start the first meeting of this secret plan.

The meeting begins.

General Rhodes and Fang Zhenguo walked onto the stage at the same time.

General Rhodes is the representative of the Supreme Parliament and Fang Zhenguo is the representative of the East China Sea headquarters, and announced the plan together: "Gathering everyone here is to launch a plan 'Second Home'.

"According to the report of the Planetary Defense Crisis Prevention Analysis Group, the Earth has become the focus planet of the Milky Way and may become the main battlefield for higher civilizations at any time.

"So we need another Earth-like planet as the second home, to continue the fire of civilization and to nurture our descendants.

"The first thing in the Second Home Plan is the choice of a terrestrial planet. What kind of planet we need to choose as the second home of human civilization."

This question is indeed a comprehensive problem in astronomy, biology and other aspects.

The most critical issue is actually the choice of star systems.

Next, Chu Xingyun, the General Staff of Planetary Defense, spoke: "With the current technological level of human beings, we have the ability to go to very distant places to build a second home.

“So, we have a lot of optional stellar systems, and the key element is the need to escape the gaze of higher civilizations.

"We need a second home that is not discovered by higher civilizations, so today we need astronomers here to find the most suitable star for us."

A professor in astronomy raised his hand and asked: "I have a question. With the current observation methods of human beings, outside the solar system, only stars can be observed but not planets. To find a terrestrial planet? It's very difficult."

"About this? The planning group has already discussed..."

Chu Xingyun answered: "The planets we need do not have to be the same as the Earth's environment. With the ability of human beings to transform the environment now? The requirements for the planetary environment are not strict.

"According to the planetary data collected by the Flying Fleet, the probability of humans survivable planets in a star system is not low. Please explain the relevant astronomy data."

Lang Tongguang stood up? He held a document? He said: "Everyone, when I received this task, I had already done some data collection.

"I started doing astronomy research thirty years ago. At that time, the astronomy community believed that there were 100 billion to 400 billion stars in the Milky Way.

"Yes? We actually can't figure out how many stars there are in the Milky Way, because most of them are not able to observe them."

He paused and continued: "We will turn to the topic. The issue we want to analyze and discuss today is to find a planet that can become the second home of mankind.

"Actually? This problem can be changed from looking for a terrestrial planet to looking for a G-shaped star.

“Why do you say so?

"In fact? The deep reason why humans call the need for Earth-like planets is actually the need for a sun-like star.

"Because only G-type stars can meet human requirements for planetary environment and climate.

“We can’t observe planets, but we can observe stars.

"According to research data, what is the probability of an Earth-like planet appearing in a G-type sun-like star system?

"The answer is 18%? Yes, in the G-type star system, the probability of Earth-like planets appearing is 18%.

"This means that if you look for terrestrial planets around G-shaped stars, you can find an terrestrial planet.

"Then, the job of finding Earth-like planets is transformed into finding Sun-like stars.

"As long as you enclose an area with at least six stars, then according to expectations, there is a complete hope of finding a second home for human beings."

After listening to Lang Tongguang's explanation, things really became much simpler.

"We have a star map, so isn't that much easier?" said a participant.

"No, we cannot choose the second home on the star map." Chu Xingyun immediately spoke out and denied this idea.

"Why?"

"First of all, the star map we got is from the Carbon-based Alliance. The accuracy of the star map is unsure..."

Chu Xingyun explained: "Secondly, this star map is actually a star map from 20,000 years ago, and the timeliness is up to date. Of course, 20,000 years have not changed much for the universe, so this star map is still of great value.

"However, humans must use their own power to update the star map, rather than relying on this old star map.

"Third, there are only 80 million stars marked on the star map, while the number of stars in the Milky Way should be more than 200 billion.

"That is to say, the stars marked with the star chart only account for 0.04% of the total number of stars, and the Milky Way has not been explored.

"We should look for a second home for humans in the unexplored star system, a second home that will not be discovered by higher civilizations."

Next.

Astronomers from all walks of life began to discuss what star field should we choose the second home of human beings.

Military research classes also gathered together to discuss.

"First of all, the particularly bright O-type, B-type, A-type, and F-type stars can be excluded, well... the F-type can be retained, and the F-type stars are at most twice the mass of the sun..."

Lang Xiaonian began to discuss with everyone: "Then the M-shaped star with the smallest mass can also be given up, and this kind of star is difficult to observe, so don't worry about it.

"The main target is G-type sun stars, with temperatures of around 5000K.

"In fact, it is easy to find sun-like stars, but how can higher civilizations not be discovered? This is the most difficult thing."

"In fact, it is not difficult. As long as it is a star field far away from the hyperspace channel, higher civilizations will basically not get close to it." Fang Yuan shrugged.

This is indeed the case.
Chapter completed!