The remaining three planets were determined not long after Yang Meng set off from the solar system.

The reason why it was discovered so late is because these three planets are too far away from the star.

Coupled with the fact that Rutan is already dim, the brightness reflected by the three planets is extremely low, making it difficult to spot.

In addition to the photometric factor,

The lower mass of the first four planets also makes them difficult to detect by gravitational perturbations.

In short, these three planets are three very inconspicuous planets.

When Yang Meng approached the Rutan Galaxy, Yang Meng further determined the data of these three planets.

In order of near and far, the three planets are named Planets F, G, and H.

And because the planets in the galaxy are not in a straight line, the last three planets also have their own detectors,

Therefore, Yang Meng only needs to wait patiently.

However, before Yang Meng waited for the detection results of the next three planets,

His plans were interrupted by something he was deeply concerned about.

"Earth's communication has arrived!"

Yang Meng, who was busy, heard Xiao Yi's prompt and immediately stopped the movements in his hand.

"Send me the information catalog! I'll see if there's anything new! ”

Hearing Yang Meng's request, Xiao Yi did not immediately respond to Yang Meng's request, but responded after a pause of less than a second:

"Please wait, the data is being unpacked!"

Hearing such an answer, Yang Meng was stunned for a moment:

"Could it be that the earth has changed to a new encryption method?"

"Yes!"

After getting Xiao Yi's affirmative answer, he was a little speechless,

"In the past ten years, the frequency of changing encryption methods on the ground has been too frequent!"

"That's right! Xiao Yi still needs to make a key this time"

"Parsing in progress, please ...... later"

"What a nuisance!"

Yang Meng complained helplessly in his heart,

But glancing at the small light floating there, he seemed to understand the earth's considerations in this regard,

Of course, at the beginning, the encryption of communication was not to prevent information from being intercepted by alien civilizations.

After all, the free microphone of mankind has been open for so long, and the alien civilization that should have discovered mankind may have discovered it a long time ago.

Therefore, the encryption of communication is not to protect against aliens, but to protect against the inside of humans.

In Yang Meng's era, the global population continued to grow explosively, breaking through the 10 billion mark.

Although population growth in the developed regions of the planet has stagnated,

But the developed regions account for only 20% of the human race.

In science and technology and humanities, they may be able to represent human civilization.

But when we look at the world, in terms of population growth, the remaining 80% of human beings are the real mainstream of population growth.

Especially after the breakthrough in nuclear fusion, the energy crisis was alleviated.

With the addition of carbon oxide and carbon dioxide, the technology for making fat and starch has matured, and the food crisis has also been alleviated.

This makes these 80% of human beings in a state of super-double breeding.

Population growth has also led to an increase in the number of complex readings within the human race.

Human beings are social creatures with complex emotions.

Because of different races, cultures, languages...... Human beings have formed different communities of interests.

These different interests constitute a complex human society.

When some interests conflict,

There will be some instability within the human race.

This also makes it impossible for humanity to fully form a unified external voice until he leaves Earth.

There is still some murmur within humanity.

And for the pioneer exploration program, there are some voices of opposition within humanity,

Some interest groups, out of a certain radical attitude, want to obstruct and sabotage the pioneer space exploration program.

In order to prevent problems before they occur,

From the moment they left Earth, humanity's communications with the 16 pioneer astronauts were encrypted.

In the 100 years since Yang Meng arrived at Lutan, human information technology has also been improving, and encryption technology has also been upgraded.

It's just that what makes Yang Meng strange is that in recent decades, the frequency of encryption upgrades seems to be a bit fast, which makes him have some worries in his heart:

"I wonder if there is something going on within the human race?"

Thinking of this, Yang Meng shook his head secretly,

"Even if there is something happening within the human race, I can't intervene!"

"And even if something happened, I'm afraid it had already happened!"

"After all, it's 12 light-years from Earth!"

Yang Meng sighed secretly, suppressed the worry in his heart, and continued the work he was doing.

Because human communication technology has not yet been able to break through the speed of light, communication is still carried out at the speed of light.

In this case, it would take 12 years for the message from Earth to reach the vicinity of Rutan,

This also makes the information he received from the location of Rutan Star 12 years ago.

"12 years! If there were no cryodormancy cycles, how many 12 years would the natural human lifespan have! ”

Thinking of this, Yang Meng, who was a professional astronaut, couldn't suppress the irritability in his heart, he stopped what he was doing and looked out of the porthole.

"I don't know, what is the situation of human beings now?"

Looking at the red star outside the porthole, Yang Meng fell into memory.

When he left Earth, he still had frequent correspondence with Earth.

Even because of the proximity,

On the earth side, the Boundless Orient can also carry out certain orbit modifications,

But everything changed when he got out of Neptune's orbit and into the Kuiper Belt.

The cycle of his communication with the earth went from hours to days to months.

After the spacecraft leaves the Oort cloud range and the spacecraft officially starts the nuclear-powered pulse propulsion, the communication cycle is counted in years.

At that time, he had already entered cryodormancy, and he himself was unable to communicate with humans.

But humans still send messages to him on an annual cycle,

Cryo-dormant technology requires astronauts to wake up every 20 years, and astronauts need to confirm the condition of themselves and the spacecraft.

During this period, Yang Meng saw many changes in human beings.

I experienced the feeling that things are wrong with people, and I also experienced the situation of receiving lagged information due to the increase of spatial distance.

This caused him to have a lot of bad emotions, but fortunately the negative emotions did not last long, and he went into sleep again.

And this cycle lasted several times, and he slowly adapted to this situation.

But now that he has completed the task,

When he was about to embark on his return voyage, after receiving the message from Earth, his heart was full of chaotic emotions.

"Maybe when I get back, it's a completely unfamiliar place!"

Just when Yang Meng was thinking wildly, Xiao Yi's voice sounded again:

"Partially decoded!

You need to make a decoder key based on some of the decoded information to get further information! ”

"Sure enough, I still need a key!"

"Xiao Yi, export the blueprint!"

"Understood!"