This is the branch of humanity represented by Captan, the third planet, the Golden Sun.

The climate on the surface of the planet is always so cold and harsh, with temperatures of more than 180 degrees below zero, water vapor and carbon dioxide freeze into a white solid. At the north and south poles of the planet, you can even find lakes composed of organic matter such as methane and ethane. These simple organic minerals are undoubtedly quite beneficial to human development.

In total, there are 30 million human colonists living in underground cities under the planet, at a depth of one kilometer.

The flame of nuclear fusion brings endless energy, and it is also the greatest courage of human interstellar colonization.

The old captain Xu Peng squinted his eyes and looked at the starry sky in the distance through a layer of thick glass. The planet is so cold that the atmosphere is frozen solid, so the air is thin and the stars in the distance are unusually clear.

Xu Peng is discerning which one is the sun and which one is the Gliese 581.

The sun at this distance is barely visible to the naked eye, but Gliese 581...... It was so bleak that you had to use an astronomical telescope to see a blurry shadow.

The old captain Xu Peng took a back seat ten years ago because of his declining energy.

But the old man is always idle, and he has become a volunteer at the observatory. In my spare time, it is also quite good to take children to see the starry sky, teach them how to use binoculars, and educate the next generation.

However, there were no children coming to the observatory today, probably because the final exams were approaching and the students were very nervous about revision...... The education of the whole civilization is still very strict, and everyone must study it seriously.

Drip!

At five o'clock, I got off work.

Anyway, being idle is boring, Xu Peng put on his power armor and walked into the vacuum chamber not far away.

Hiss!

The air extraction pump slowly extracts the air from the vacuum chamber. Immediately after, he opened the door of the air pressure gate, and there was a heavy "click", but fortunately, the gas in this room had been almost pumped, and not much air leaked out.

The electronic prompt in the security gate sounded, "A-class clearance personnel, General Xu Peng, hello." ”

"Please be careful when you go out and pay attention to outdoor safety. The temperature outside is currently minus 182 degrees Celsius. ”

Xu Peng walked along the glass tunnel to an observation platform.

From this position, you can see the space elevator at an altitude of tens of thousands of kilometers when you look up, and if you use the telescope function that comes with Power A, you can clearly see that the spinning centrifugal wheel on it is rotating, various transport spacecraft coming and going, and a ......

Huge mothership!

Yes, for interstellar expeditions, there must be a supercarrier so that it can accommodate a larger population.

And more population means more productivity, as well as maintenance capacity. Especially the latter - the ability to maintain, in the starry sky, without maintenance, it is impossible for a warship consisting of armies to cross a distance of several light years.

"If only humans could live longer...... That would eliminate the need for long-term rotational hibernation, requiring fewer people and allowing ships to be built smaller. ”

For this interstellar voyage, the relevant interstellar astronaut training work is also ongoing, which has lasted for more than 20 years.

"In another three or five years, the entire Starfleet will be built...... It's time to go. ”

Thinking of this, Xu Peng couldn't help but feel strong about it.

Although this is the story of young people, it is good to play a little bit of residual heat.

This time, the target was a nearby star JM7812317, about 4.7 light-years away, near the cosmic string.

Eleven years ago, through the largest astronomical telescope, mankind actually observed the flash of the nuclear bomb on the next planet!

Of course, the flash of these nuclear bombs is very weak, and according to the rational judgment of hindsight, it should be an intraplanetary war, not a large-scale interstellar war.

In other words, this unknown civilization actually had an internal nuclear war!

Therefore, after some discussion, the high-level civilization decided that the first stop of the interstellar voyage would not have a good goal anyway, so they would simply go to this planet for a scientific expedition first.

Even if you collect history, it is good to improve the historiography of the new civilization.

"However, the military aspect still needs to be strengthened...... Since this civilization has broken out in an internal nuclear war, it is theoretically a belligerent type, and it is unlikely that it will re-emerge in a few decades, and it is not certain that it has even self-destructed. However, it is always necessary to guard against ......"

A voice suddenly sounded in his ears, it was his good friend Lu Zhongping. The two old men often looked out at the space above here.

Xu Peng nodded: "Interstellar travel is definitely risky, but the benefits will be greater...... We humans are here alone, and it's too slow and too slow. If it goes on like this, it's not a good thing. ”

"Even if this civilization is not as advanced as ours in terms of overall technology, there must be something different......

"Hey, if you come into contact with a more powerful civilization, you will undoubtedly get more gains...... But our common sense about the cosmic civilization is too lacking, and it is better to re-engage with a weaker civilization. ”

"If we get good results, is it possible to send one to the other two civilizations...... I just don't know if Earth Age exists, or if we're just doing useless work. ”

The wrinkles on Lu Zhongping's face are like deep hills and ravines, and he still remembers the bets he made with those young people at the beginning, some say one hundred years, some say two hundred years, and some say three hundred years.

Almost 60 years have passed......

Time flies like a white horse, the world is like a white cloud and a dog, I really hope that in my lifetime, I can wait for the news......

"I just don't know how many years I have left to live."

Didi! Didi! Didi!

Just in the middle of such emotion, the communication device on the power armor of the two suddenly rang. Xu Peng glanced at the red mark, and his heart instantly tightened.

Red Emergency Meeting!

There are three levels of emergency meetings, the highest level of red, the secondary orange, and the lowest level of blue.

Red emergency meetings are almost the most important of all. According to the regulations, everyone who receives the message must rush to the nearest meeting site within 10 minutes!

"I don't know what's going on......"

"So the asteroid is about to hit the base? That's what meets the red standard, right? ”

Worried, the two hurried back to the underground base, speculating wildly in their minds.

Along the way, I saw many people screaming and carnival, it was like having a carnival party, and I was a little confused.

"What's going on?"

Xu Peng stopped a young man whose face was flushed with excitement, and this guy was so excited that even the blood vessels on his forehead bulged out one by one.

"Old Captain...... Earth...... Earth! The young man was so nervous that he began to stutter, and he could only spit out the word "earth", and he couldn't say anything more.

However, that's not what he wanted to say!

This caused him to become more and more anxious, his face was red and swollen like a red balloon, and he actually forgot how to say the second half of the sentence.

"Could it be that the earth civilization has sent a letter?" Lu Zhongping, who was standing on the side, made a look of sudden realization, "I see, this is really good news." ”

"But would the civilization of the earth really do such a thing? Let's go, civilization go and see. ”

This kind of misunderstanding makes young people even more anxious, what earth civilization, obviously it is the human branch of the Earth Era, these are two completely different concepts.

Finally, he struggled to think of a good solution, he grabbed a handful of his hair fiercely, and the sharp pain of this grasp allowed him to break through the boundaries of his brain, "Old Captain, Professor Lu......"

"Not the Earth...... It was the Earth Age that wrote back to us! ”

……