The conversation lasted for almost the entire Earth Day, during which it was learned that the average lifespan of their race was 130 Earth years.

At the same time, through their perspective, the preciousness of the solar system speaks for itself. What they call 1-1067 is actually HD-10180, which is also one of the star systems with the largest number of planets outside the solar system discovered by humans in the age of Earth.

Probably, for some reason, they did not identify Kepler-90. In fact, it also exists with 8 planets.

Even though it has 8 planets, the entire star system is very small, and the farthest planet, Kepler-90h, is only as far away as the Sun and Earth.

Take out the star systems that you have visited alone, whether it is Proxima Centauri, Barnard, Amakura 5, and now Gliese 581.

They all have relatively small star systems, and most of the planets in the star system are of similar size.

Whether it's a quarter of the size of the Earth, or about 20 times the size of the Earth.

Despite their wide variation in size, planets are often about the size of their "neighbors", like peas in a pod.

Only the eight planets are very different in size, and the solar system seems to be a "freak" in the star system.

Even though a super-Earth can find a large number of them, the solar system may be unique, and it is difficult to find a similar star system in the universe.

"It's time for me to go back."

Ruan Lin stood up, stretched out his right hand, and met Kan's eyes.

"This is our civilized etiquette, thank you for meeting you."

Kan also understood the feeling of "hating each other late" at this moment.

His six claws spread out and gripped Ruan Lin's hands tightly, and Ruan Lin then swung up and down three times.

The picture then also made a parting handshake.

"In the next 430 high beams, I will help you rebuild your civilization for the time being. In the future, you still need to walk step by step by yourself. ”

This is just a casual move for Ruan Lin, and the Yuanguang civilization has also had a gesture of goodwill communication with humans in the earth age.

After all, they are a civilization that seeks to "be alone in itself".

"Very.. Thank you! ”

After saying goodbye to them, Ruan Lin returned to the Titan, and the next thing was to welcome the old movie 43 years later.

Ruan Lin finally relaxed: "WIT, in the past 43 years, we need to continue to improve the photonic quantum computer of the Titan civilization. ”

The first step in the establishment of this hypothesis was the timely arrival of Interstellar.

Ruan Lin laughed at himself: "If it comes as scheduled, I have to watch it again!" In the future, science fiction films will not need to be conceived by humans, after all, what I have experienced is difficult enough for people to understand. ”

In the first 8 years, Nguyen Lin carried out a full-range broadcast of three colonized planets, and parked hundreds of thousands of meteor-class destroyers on the surface, countless bases were built, and the robots on the surface never tired of cleaning up the ruins.

According to complete statistics, the remaining members of their civilization are about 9.2 million. As long as there is enough base, their civilization will surely continue.

And the fate of the remaining 1,722 members of the Wanderer Civilization can be imagined.

For the next 35 years, Nguyen Lam still shared a small amount of computing power and helped them build countless shelters. During this period, the scientists of the Yuanguang civilization also carried out several exchanges with Ruan Lin, and they taught Ruan Lin the "planetary environment modification technology" that integrates the entire civilization in Dacheng without omission.

This is a technique that Ruan Lin never envisioned, and this device is similar to a "stance generator", as long as the device is placed somewhere on the surface, it will generate a set parameter value of temperature in the area, and amplify the illumination of the star.

The range is about 50km in radius.

This is actually an electric blanket and a light magnifying glass.

The most important thing is that after its "tentacles" reach down the surface, like the roots of a century-old tree, it can unconsciously complete the transformation of the surface environment, and the original rocks on the surface and all kinds of uninhabitable obstacles will be transformed by it.

After Ruan Lin's commissioning, it can even absorb carbon dioxide and release a large amount of oxygen.

It took only 80 Earth years for the Yuanguang civilization to transform the Gliese 581D, which is their specialized technology.

WIT prompted, "Dr. Nguyen, the time you set has come. ”

Today is 43 years after the collapse of the envisioned "barrier", and Ruan Lin has been sitting in the main control room.

"Wit, open the center screen."

Nguyen Lin also gave up all work today, he just wanted to prove the validity of this hypothesis.

He was impatient, his eyes fixed on the reflection on the screen.

The wait had been going on for 15 hours, and he still didn't say a word, his eyes never taking off the screen.

WIT suddenly prompted, "Dr. Ruan, the Titan has received a message. Other possibilities have been ruled out, and the source of the launch: the solar system. Estimated information launch time: 43.1 years ago. ”

The arrival of this news undoubtedly proves the barrier hypothesis! Ruan Lin hurriedly urged: "Hurry up and start translating!" The electrical signal is restored to an audible signal and a light signal, and I need to see the concrete image on the center screen right away! ”

Waiting, waiting. Ruan Lin was already restless, and he hoped that the old movie would start playing immediately.

Two minutes later, there was a concrete image on the central screen, and the speakers on both sides began to work.

The Warner Bros. at the beginning of the film does not appear, and the picture starts with a space shuttle, and next, Ruan Lin sees a familiar human appearance.

"Humans."

He couldn't suppress his inner feelings, and at the same time had doubts: the messages of the previous 501 paragraphs, and now the whole movie, they did not receive any loss or interference in the process of sending.

What they look like when they are sent and what they still look like when they are received, spanning 20.3 light years, it is almost impossible for this to exist.

Assuming that this information is unhindered and sent by humans themselves, Gliese 581 has a set of receiving devices.

Since Gliese 581 is 20.3 light-years away from the Earth, the propagation loss of radio waves is roughly 2000dB, so when the radio waves on Earth reach Gliese 581, the maximum signal strength per unit area is already below -1250dBm, that is, when they arrive, part of the information has become garbled, which is still the result of not considering other interference radiation.

In the picture, their conversation also woke up Ruan Lin.

"What about Murphy's Law?"

"Murphy's Law doesn't say that bad things happen, but that whenever it's possible, it will happen."

Is it possible that an unknown civilization has put such a barrier on the solar system to hinder humanity?

Or, to protect naïve humans?

Looking back at the past, the human beings of the Earth Age are like frogs at the bottom of a well, they don't know that there are so many civilizations in the universe, as long as there is a civilization passing by and a civilization that receives news.

If the civilization happens to be like the "Trisolaran" in the novel, their home planet is no longer inhabitable, and they are looking for a planet suitable for them to live in.

And the solar system is not equipped with this barrier.

So what kind of catastrophe will befall humanity?