Vol 4 Chapter 1043: Second home plan

It didn't take long for the expedition fleet to return to earth.
The Supreme Council of Mankind launched a secret plan.
Some students from the military scientific 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 Xiaosiyan the person in charge for such an important task of opening a mine? I am not convinced!" Niu Dazhi heard that he would listen to Lang Xiaonian's arrangements, and he was immediately dissatisfied.
"Xiao Nian, let's kick him out of the secret planning team." Eve urged.
"Brother Dazhi, the secret plan this time is related to astronomy. I am the representative of the class, and my dad is in charge of the Military Academy of Sciences, so it is more convenient to get in touch." Lang Xiaonian explained.
When Niu Dazhi heard this, he laughed, patted Lang Xiaonian's shoulder and said: "Xiaonian, I am absolutely confident in your astronomy attainments. I am optimistic about you and work hard."
He had just finished speaking when he was suddenly flew out and hit the wall with a hand.
"Sit down, the professor is going to allocate 10% of the computing power to participate in the discussion of this secret plan." Fang Yuan slapped Fei Niu Dazhi, let everyone sit down and officially start the first meeting of this secret plan. .
The meeting begins.
General Rodriguez and Fang Zhenguo took the stage at the same time.
General Rodriguez, the representative of the Supreme Council, and Fang Zhenguo, the representative of the East China Sea Headquarters, jointly announced this plan: "Gathering everyone here is to start a plan for the "Second Home".
"According to the report of the Planetary Defense Crisis Prevention Analysis Group, the earth has become the focal planet of the galaxy and may become the main battlefield of advanced civilizations at any time.
"Therefore, we need another terrestrial planet as a second home to continue the fire of civilization and nurture our children and grandchildren.
"The first thing in the Second Home Plan is the choice of terrestrial planets. What kind of planet we have to choose as the second home of human civilization."
This question is indeed a comprehensive question of astronomy and biology.
The most critical issue is actually the choice of star system.
Next, Chu Xingyun of the Planetary Defense Staff made a speech: "With the current level of human technology, we have the ability to go to a very remote place to build a second home.
"Therefore, we have many star systems to choose from, and the key element is that we need to avoid the gaze of higher civilizations.
"We need a second home that will not be 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 mankind, outside the solar system, only stars can be observed, but no planets. Looking for an earth-like planet? difficult."
"About this? It has been discussed within the planning team..."
Chu Xingyun replied: "The planet we need does not have to be the same as the earth's environment. With the current ability of humans to transform the environment? The requirements for the planetary environment? are not strict.
"According to the planetary data collected by the voyage fleet, the probability of human survivable planets in a star system is not low. For the relevant astronomical data, please explain to Professor Lang."
Lang Tongguang stood up? Holding a document? and 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 are 100 to 400 billion stars in the Milky Way.
"Yes? We actually don't know how many stars there are in the Milky Way, because we can't observe most of the stars."
He paused, and then said: "We turn to the topic. The problem to be analyzed and discussed today is to find a planet that can become the second home of mankind.
"Actually? This problem can be transformed from looking for an Earth-like planet to looking for a G-type star.
"Why do you say that?
"Actually? The so-called deep-seated reason that humans need terrestrial 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 terrestrial planets in a G-type sun-like star system?
"The answer is 18%? Yes, in a G-type star system, there is an 18% probability of terrestrial planets.
"This means that if you look for terrestrial planets around G-type stars, you can find one terrestrial planet by looking for an average of 5 or 6 stars.
"Then the job of searching for terrestrial planets is transformed into searching for sun-like stars.
"As long as we delineate an area that includes at least six stars, then it is completely hopeful to find a second home for mankind according to expectations."
After listening to Lang Tongguang's explanation, things really became much simpler.
"We have a star map, isn't that much simpler?" a participant said.
"No, we can't choose a second home on the star map." Chu Xingyun immediately denied this idea.
"why?"
"First of all, the star map we got is from the Carbon-based Alliance. The accuracy of the star map cannot be determined..."
Chu Xingyun explained: "Secondly, this star map is actually a star map from 20,000 years ago, and the timeliness is open to question. Of course, 20,000 years is not a big change for the universe, so this star map is still valuable. huge.
"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 on the star chart, while the number of stars in the Milky Way should be more than 200 billion.
"In other words, the stars marked by the star icon account for only 0.04% of the total number of stars, and the exploration of the Milky Way is far from complete.
"We should find 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, in which star field, the second home of mankind should be selected.
The military research class also gathered to discuss.
"First of all, the particularly bright O-type, B-type, A-type, and F-type stars can be excluded, um...F-type stars may be retained. F-type stars are at most twice the mass of the sun..."
Lang Xiaonian began to discuss with everyone: "Then the M-type stars with the smallest mass can be given up, and this kind of stars is also difficult to observe, so just ignore it.
"The main search target is G-type solar stars, which have a temperature of about 5000K.
"In fact, it's easy to find sun-like stars, but how to prevent higher civilizations from discovering it? This is the most difficult."
"In fact, it is not difficult. As long as it is a star field far away from the hyperspace channel, the advanced civilization will basically not come close." Fang Yuan said with a shrug.
This is indeed the case.
The main reason why the solar system was discovered by advanced civilizations is that there is a hyperspace node in the solar system leading to Tianyuan IV.