Everyone was unified, but Lin Shanshan said no, she said: "Our decision has no effect of half a dime, only the professor's decision is the real decision, if he says not to contact, it is useless for us to have the most unanimous opinion." ”

"Didn't we say guess the professor's mind? we guessed the professor would connect, haha. Seriously, we really don't have that decision. Xu Jiawei said.

They don't talk about it anymore. It's boring to sit in the lab and stare at the constant video, Xu Jiawei said that it is better to take turns on duty, and everyone agrees. Xu Jiawei arranged for himself to be on the first shift.

The laboratory was very quiet, and there was no sound in the video sent back by Tianhua No. 1, indicating that the sky over there was also quiet.

Xu Jiawei's research direction is to find extraterrestrial resources, and he has a major premise in his research, which is to confirm that there is no life on this planet, and only under this premise can it be meaningful to study, because only lifeless planets can exploit resources there, otherwise competing for energy with the creatures on this planet will inevitably lead to Star Wars.

So far, human beings have not really exploited resources on planets outside the solar system, first, they are not sure whether there is life, and the definition of life is no longer the standard on the earth, let alone water and oxygen are simply regarded as the basic elements of life; second, the technical requirements have not yet been met, Xu Jiawei and what they are doing is to explore the way, and how to mine it is a matter of other teams; third, they do not mine the large planets in the solar system, for fear of destroying the environment of the solar system. Xu Jiawei once went to Venus when he was in college, according to the standards of the earth, the surface temperature of Venus is as high as 500 °C, the atmospheric pressure is about 90 times that of the earth, there is no liquid water, coupled with extremely high atmospheric pressure and severe hypoxia, often falling huge corrosive acid rain and other cruel natural conditions, there is no life, can be exploited. But Xu Jiawei believes that it is not only based on human standards to measure whether it is suitable for life, but also by the standards of Venus, life on the earth is not suitable for survival there does not mean that there can be life there, if there are also "people" over there, they will also say that the earth's environment is too bad, there is no air for them to breathe, 71% of the surface is occupied by liquid water, there is no warm sunlight, and the highest temperature of only a few tens of degrees will be frozen to death at once, and it is simply impossible to survive. And even if Venus is confirmed to be lifeless, it is not known whether large-scale mining will cause environmental changes in the solar system. After he returned from Venus, he published a paper in which he mentioned that life on Venus could not be ruled out, and that in addition to scientific investigations, it was not possible to artificially intervene in the atmospheric environment of Venus, take it for granted to modify Venus, and it was not encouraged to arrange travel to Venus, let alone go to Venus for mining. His views caused a sensation in the astronomical community, and Professor Shen Wei, who enjoyed an authoritative reputation in the world, recruited him directly into the institute after he graduated, becoming the first disciple of his current research team, according to the ancient martial arts gang, "senior brother".

The development and utilization of asteroids has been carried out for three centuries, and after the World Science Conference 400 years ago, scientists from all over the world adopted the opinions of Chinese scientists and established a base on Mars with global wisdom to mine asteroid resources nearby. Asteroids outside Mars contain countless asteroids that could be mined for hundreds of millions of years. The mining technology of asteroids has been very mature, and asteroids with a diameter of less than one kilometer can be directly captured to the Mars base as a whole, and intelligent people will be sent to mine and transport large ones. After being made on Mars, some of them are transported back to Earth, and some are used there, such as spaceships, and the launch base for space travel has been transferred to Mars. Many of the materials on these asteroids can not be found on the earth, especially the materials used in spacecraft, after using the materials extracted from the asteroid, the efficiency is higher than that on the earth, this internationally named Z-3 material, through the synthesis of rare metals on the earth, can be automatically converted into kinetic energy, and the speed of flight reaches 10 times the speed of light, at present, interstellar travel uses this material, human activities in the solar system, to reach any point is a matter of minutes. Theoretically, this Z-3 material can be made into a spacecraft that can reach infinity in a vacuum, and 100 times the speed of light has been successfully tested in the laboratory. In the asteroid belt, there are an incalculable number of such asteroids with Z-3 elements, and the materials made on Mars are enjoyed by the participating countries as needed. After the hegemon brought about its demise, the world was at peace, no one came to grab resources, everyone was an equal member, sharing the gifts of nature.

Ten days later, when Lin Shanshan was on duty, she noticed a subtle change in the planet Proxima Centauri, and she immediately called her companions into the laboratory.

"Look closely, what has changed in the past few days?" Lin Shanshan asked everyone.

Xu Jiawei said: "The changes are relatively obvious, and it can basically be judged that, first, the two planets closest to the star have atmospheres; second, the outer planets are, the larger their physiques. ”

"It would be nice if the professor was here, and ask Tianhua Xiaozhi to measure the matter in the atmosphere to see if it is suitable for human survival on the earth. Lin Shanshan said.

"Isn't it sooner or later? The professor will be back soon, and the answer will be in a moment. I'm interested in whether there are humans hiding here, you see, Proxima Centauri is a red dwarf, with a smaller mass than the Sun, and a lower temperature than the Sun, and the first two planets have atmospheres, maybe suitable for human life. Also, there are a large number of planets in the constellation Centauri, and there are three suns, and there is plenty of heat, so there is a lot of room for humans to find a suitable place to live here, and the message from 15 billion light-years away is sent in this direction, maybe our ancestors are hiding here. ”

"Makes sense, but why didn't our ancestors contact us? Ma Biao said.

"It's not simple, they live comfortably here, and the humans on the other side of the earth are also alive and well, there is no intersection between the two sides, why should they contact?" Chen Jie said.

"It's also possible that they're always in touch with us and in our midst, but we don't know it. Maybe the professor was sent by them, otherwise why is he so smart. Xu Jiawei said and laughed.

"Why are you talking about me behind your back? "I really said that Cao Cao Cao arrived, Professor Shen Wei came back, and he was very satisfied to hear that the discussion in the laboratory was so interesting.

"Warmly welcome the professor back to the team!" Lin Shanshan said.

"Hmph, I was originally a member of the team, but I just left for a few days and said something about returning to the team. Professor Shen Wei smiled and said, "Tell me, how was the discussion?"

Xu Jiawei said: "There are two aspects, one is the handling of that message, we think we should reply, but not in a hurry, we only reply when we make sure that nothing goes wrong, and hide our location when replying." Another is Tianhua Xiaozhi sent a video message, according to our analysis, the 5 planets on Proxima Centauri, the first two have atmospheres, maybe our ancestors live there, or live on a planet in the constellation Centauri, this message was sent to them, and we captured it. ”

"Yes, yes, the students are working hard and analyzing very well. Professor Shen Wei encouraged.

"Then how is the meeting over there, Professor, has it been settled?" asked Xu Jiawei.

"It's decided, agree with my plan in principle, just wait a little longer, see if there is any follow-up news, if there is no follow-up news, it means that they have been instructed to take the next step, which proves that there is a group of human beings like us outside our earth, their technological level is more advanced than ours, for them 15 billion light years is not a very long distance, and they can go back and forth in the current life of life, and it is more likely that it is as convenient as us going to Proxima Centauri. If there is a follow-up message, depending on what the content of his message is, if it is waiting for the same reply, it means that this message was not sent tens of thousands of years ago, it is likely to be sent not long ago, and the destination is the earth, which proves that it was sent by our prehistoric humans. If so, we can try to reply. ”

"What do you mean by trying to reply?" Ma Biao asked softly.

"At the Academy of Astronomical Sciences, we have completely ruled out the possibility of a virus, proving that this message is true, it is just a question of who to send it to, and we say that we try to reply for two reasons, one, to see how long it takes them to receive the message and reply to our message, and second, whether they can understand what we are saying, otherwise a misunderstood message by them will lead to catastrophic consequences. ”

"Then why don't they use video and audio means?" Xu asked.

"Maybe they're using it, it's just that the technical standards are different, we can't receive it, maybe their generation didn't think about this technology, and prehistoric humans certainly didn't think exactly the same way as we do. Professor Shen Wei said.

"So how do we use tentative language?"

"It depends on what the content of his next message is, and this specific content cannot be studied in such a meeting, which is our team's business. Shen Wei said, "Also, the conference on the follow-up research made a prospect, you can send a spacecraft to respond, the biologists who participated in the meeting said that human beings fly faster than the speed of light in space, the body will stop developing, so that the problem of birth, old age, sickness and death is solved, the material of the spacecraft is no problem, as for the speed, we have successfully tested the speed of 100 times the speed of light, once put into use, outer space travel is basically no problem." ”

"I don't think it's fast enough, even if it's 100 times the speed of light, it will take 150 million years to go to a place 15 billion light-years away, it's unrealistic, there must be faster, for example, the prehistoric human spacecraft must have exceeded 100 times light-years. Xu Jiawei said.

Professor Shen Wei admired Xu Jiawei's thinking, he said: "Jia Wei is very right, 100 times the speed of light is too slow for space travel, we should build faster spaceships, but at present, our technology is only at this level, ha, science is not in a hurry." ”

"That's right, let's not think about flying to such a distant place first, do what is in front of us well, think about the language of the reply, and we must not misunderstand the other party. Xu Jiawei said.

"Professor, do you want to watch the video sent by Tianhua Xiaozhi?" Lin Shanshan said.

"Oh, the most important thing right now isn't the one 15 billion light-years away. Professor Shen Wei said.