The spacecraft continued to fly forward, during which the luminosity of Nanhe San changed again,

Because it began to move away from the star, the energy that the little light received from the star also began to decline.

The brightness of its body has also begun to become weaker, and its efficiency in some work has also decreased rapidly.

"I need to go to sleep!"

Seeing Xiaoguang say this, Yang Meng glanced at it and nodded, and did not force Xiaoguang.

"Speaking of which, I'm almost ready to sleep!"

During this time, he also roughly finished reading the letters from the earth,

Except for the news of the gray force's escape, Yang Meng did not find other factors that affected his return.

Although he was a little worried about the changes within the human race, he knew that at such a great distance, cranky thoughts would only add to his troubles!

"Xiao Yin! How far is the ship from Earth at the moment?"

"About 11.26 light years!"

"Eleven light-years away!"

Hearing such data, Yang Meng sighed secretly,

At 10% of the speed of light, it would take him 110 years to return to Earth.

However, when he left the earth, with the human space technology at that time, the spacecraft could already maintain 14% of the speed of light to travel.

If he were to return directly to Earth, it would probably take less time with the space technology he now has at his disposal.

It's a pity that he can't return to Earth now.

"Xiao Yin, how far are we from the Ross 128 system?"

"We are currently 9.8 light-years away from the Ross 128 system!"

Hearing such data, Yang Meng was not surprised at all,

The Ross 128 galaxy itself is not a star system that is relatively close to Nanhe-3.

Therefore, he has long known such a distance,

And his next route, compared to the solar system, will be a horizontal course,

In this case, his distance from the solar system will hardly decrease much,

will greatly delay his return to Earth,

This is also the reason why Yang Meng was reluctant to go to the Ross 128 galaxy before.

But now, in the face of teammates who have not heard from him so far,

As an astronaut close to the Ross 128 system, he was obliged to go and investigate.

"Anyway, now that you're sure to sail, prepare to sleep!"

This time Yang Meng's dormancy time,

Unlike the short period of a few years from Rutan Star to Nanhe San,

He needs to go dormant on a 20-year cycle.

Although such a dormant time has been set, but in the face of the unknown star field between Nanhe-3 and Ross 128 galaxy,

Yang Meng still has no bottom in his heart, and he doesn't know if he can sleep peacefully twenty years ago.

The cosmic space looks extremely empty,

But in reality, there is not such a "vacuum"

Human detection technology can only detect celestial bodies that actively emit energy, or passively reflect energy.

But for those wandering celestial bodies that wander in the universe, do not emit any light or heat themselves, and the core is not cooled and does not have a magnetic field,

and some wandering asteroids that are too far away from the star to reflect light at all.

Humans have the detection technology that cannot detect these celestial bodies at very long distances.

And the speed of the spaceship is extremely fast, if you can't dodge,

And these celestial bodies have also become dangerous reefs in the ocean.

In the process of traveling from the solar system to Rutan, Yang Meng has encountered such a reef area more than once.

Fortunately, thanks to the work of the spacecraft's automatic obstacle avoidance system, most of the reef areas were evaded.

And in the process of dodging,

He also explored a new course for mankind,

This is also one of the missions of being a pioneer astronaut, walking

At the forefront of all human beings, we are looking for convenient routes for human beings to explore the universe.

And now he is traveling from the Nanhe three-star system to the Ross 128 galaxy,

It is another new opening process, but it is a pity that the opening of this route has no meaning for mankind for the time being.

Although it is of little significance, Yang Meng still has to make all kinds of adequate preparations.

"Xiao Yin, under ideal conditions, how fast can the spaceship accelerate?"

"Considering the overall situation of the spacecraft, under theoretical conditions, the spacecraft can maintain 20% of the speed of light in a relatively clean space!"

"Can you maintain 20% of the speed of light?"

Seeing that Xiao Yin's conclusion was higher than his expectations, he was not happy,

Such conclusions are obtained only under theoretical conditions,

If it is theoretical,

As long as there is sufficient energy, through a long period of acceleration, it is not impossible for the spacecraft to reach 90% of the speed of light, or even infinitely close to the speed of light.

But that's just a theory.

In theory, a small smooth piece of iron can move infinitely on a plane with no friction and no resistance.

If you apply a little acceleration to this little piece of iron,

This acceleration doesn't need to be much, it only needs to be as big as a fart.

Under the continuous fart power, through long-term acceleration, the iron can also be accelerated to the speed of light, which is the principle of the speed of light.

But in the universe is not a complete vacuum,

From leaving the solar system to the present, Yang Meng's understanding of this matter is very profound.

Except for those dark objects that cannot be detected from a distance,

The universe is in an uneven state, with some dust and high-energy charged particles distributed.

When the speed of the ship exceeds 14% of the speed of light,

These dust and high-energy electrical particles will cause friction-like phenomena on the spacecraft, which will affect the external structure of the spacecraft.

In the process of traveling from the earth to Rutan, we often encounter dust areas and high-energy charged particle belts.

In order to ensure the safety of the spacecraft, it is necessary to accelerate and decelerate the spacecraft, which is why the sailing distance that originally took only 90 years has become more than 100 years.

And now those who go to the Ross 128 galaxy will still go through this process,

According to the theory provided by Xiao Yin, it only takes him fifty years to reach the Ross 128 galaxy.

But in reality it may take longer,

"Speaking of which, the theoretical uniform speed given by aerospace engineers when they left Earth was 14% of the speed of light."

"Today, the theoretical uniform speed of the Ross 128 galaxy can reach 20% of the speed of light.

That's a lot of progress!"

Thinking back to what happened during this time,

Yang Meng let out a long breath,

The earth has carried out a lot of aerospace technology upgrades in the past hundred years.

It's a pity that aerospace engineering requires a large number of rare metal elements,

At that time, Yang Meng did not have the conditions to upgrade when he went to Lutan Star.

And now that the resources have been replenished,

He also finally obtained new equipment according to the upgrade method on the ground.

An upgrade has been made from the propulsion unit to the protection unit, which allows the spacecraft to cope with a more complex cosmic environment and obtain a higher theoretical constant speed.

When communicating with Xiao Yin about the next voyage,

Yang Meng is also ready for cryo-dormancy.

……

At this time, the spacecraft has not yet left the gravitational disturbance range of Nanhe San,

And there are still some things that Yang Meng cares about in the three-star system of Nanhe, but he still decided to go into cryo-dormancy.

If the sleep goes well, it may be 20 years before he wakes up again......