This is the human branch represented by Kaptan, the third planet, the golden sun.

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

A total of 30 million human colonists live in underground cities one kilometer deep under the planet.

The fire of nuclear fusion has brought endless energy, and it is also the greatest courage of human interstellar colonization.

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

Xu Peng is distinguishing which is the sun and which is Gliese 581.

The sun at this distance is barely visible to the naked eye, but Gliese 581... It's too dark to see a blurred shadow with an astronomical telescope.

Xu Peng, the old captain, retired to the second line because of his energy decline ten years ago.

But the old man is always busy. He has become a volunteer at the observatory. It's also good to take children to see the stars in their spare time, teach them how to use telescopes and educate the next generation.

However, no children came to the observatory today. It may be because the final exam is coming and the students are very nervous about review... The education of the whole civilization is still very strict, and everyone must study hard.

Drop!

It's five o'clock sharp. It's 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 pump slowly draws out the air in the vacuum chamber. Then he opened the door of the air brake and made a heavy "click". Fortunately, the gas in the room had been almost pumped out, and there was not much air leaking out.

The electronic prompt in the safety gate sounded, "class a authorized personnel, General Xu Peng, hello."

"Please be careful when you go out and pay attention to outdoor safety. At present, the outdoor temperature is minus 182 degrees Celsius. "

Xu Peng walked along the glass tunnel to an observatory.

From this position, you can see the space elevator tens of thousands of kilometers high. If you use the telescope function of power a, you can clearly see that the rotating centrifugal wheel is rotating, all kinds of transport spacecraft come and go, and one

Huge Mothership!

Yes, there must be a super carrier for the interstellar expedition, so that it can accommodate more people.

And more population means more productivity and maintenance capacity. In particular, the latter - maintenance capability. In the starry sky, without maintenance, a warship composed of an army cannot span a distance of several light-years.

"If only human beings could live longer... Then there would be no need for long-term rotation hibernation, less population and smaller spaceships."

For this interstellar voyage, the relevant interstellar astronaut training has also continued for more than 20 years.

"In three or five years, the whole Starfleet will be built... You can start."

Thinking of this, Xu Peng can't help but be ambitious.

Although this is a young man's story, it's good for an old horse to stay in the Carpinus, have a great ambition, shine and heat here, and give play to a little waste heat.

The starting target this time is a nearby star jm7812317, about 4.7 light-years away, a star near the cosmic string.

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

Of course, the flash of these nuclear bombs is very weak. According to the rational judgment afterwards, it should be a war within the planet, 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 of civilization decided that there was no good goal for the first stop of interstellar navigation anyway, so they simply went to the planet for scientific investigation first.

Even if we collect history and improve the history of new civilization, it is also good.

"However, the military aspect still needs to be strengthened... Since the internal nuclear war broke out, this civilization is theoretically belligerent. It is unlikely to rise again in a few decades, or even self destruct. However, we should always guard against one hand... "

A voice suddenly sounded in his ear. It was his good friend Lu Zhongping. Two old men often overlook the space above here.

Xu Peng nodded: "Star Trek must be risky, but the benefits will be greater... It's too slow for us to explore science and technology here alone. It's not a good thing to go on like this. "

"Even if this civilization, the overall technology is not as developed as ours, there are always some different things..."

"Hey, if you contact a stronger civilization, you will undoubtedly get more... But we are too short of common sense about cosmic civilization. It's better to contact from a weaker civilization."

"If we get good results, can we send a copy to the other two civilizations... We just don't know whether the earth age exists, or we're just doing useless work."

The wrinkles on Lu Zhongping's face are like deep gullies. He still remembers gambling with those young people. Some say 100 years, others say 200 years, and others say 300 years.

Almost sixty years have passed

Time passes like a white horse, and things in the world are like clouds and dogs. I really hope to wait for news in my lifetime

"I just don't know how many years I can live."

Didi! Didi! Didi!

With such emotion, the communication device on the power armor suddenly rang. Xu Peng took a look at the red mark and his heart tightened in an instant.

Red emergency meeting!

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

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

"I don't know what happened..."

"The asteroid is about to hit the base? Is that enough for the red standard? "

Full of worry, they hurried back to the underground base, guessing in their hearts.

Along the way, I saw many people screaming and reveling. It was like a Carnival Party. I didn't understand it.

"What's going on?"

Xu Peng stopped a young man whose face was flushed with excitement. This guy was even excited that the blood vessels on his forehead protruded one by one.

"Old captain... Earth... Earth!" The young man was so nervous that he began to stutter. He could only spit out the word "Earth", but he couldn't say anything behind him.

However, the meaning he wants to express is not that at all!

This made him more and more anxious. His face was red and swollen like a red balloon. He actually forgot how to say the second half of the sentence.

"Is it a letter from earth civilization?" Standing on one side, Lu Zhongping made a look of sudden enlightenment, "I see. This is really good news."

"But will earth civilization really do this? Come on, let's go and have a look. "

This misunderstanding makes young people more anxious. What earth civilization is clearly a human branch of the earth times. These are two completely different concepts.

Finally, he struggled hard and thought of a good way. He grabbed his hair hard. The severe pain made him break through the boundary of his brain, "old captain, Professor Lu..."

"It's not the earth... It's the earth times that replied to us!"

……