(Not modified, please ...... later) ）

Although there are still many incomprehensible places in the cobblestones, after Yang Meng controlled the flight status of the pebbles,

The concerns at the end of the trail have also been solved.

Now the only remaining problem is the planet in the Ross 128 galaxy,

"Are we finally going back?"

As the ship slowly turned around, Xiaoguang seemed to sense something.

Floating in front of the porthole flickering slightly, for the next action, showing some excitement,

And at this time,

Yang Meng was floating in front of the porthole, looking at the other side, the somewhat darkened Ross 128 galaxy,

In my heart, I silently communicated with Xiao Yin,

"Did the Ross 128 galaxy detect anomalies during this time?"

"The detector in the silent passive monitoring trigger state has not detected anything abnormal since that faint signal!"

Hearing Xiao Yin's words, Yang Meng sighed silently in his heart,

Then I thought of something and instructed Xiao Yin:

"When re-entering the Ross 128 system, the ship remains completely silent!"

"Understood!"

Looking at the red dwarf outside the porthole,

Yang Meng thought about whether he should also launch a signal simulation device in the direction of the earth.

Let her on the planet Rose 128, or other beings, mistakenly think that he has embarked on the journey back to Earth,

But after thinking about it carefully, Yang Meng still didn't waste resources after all.

Now he's outside the Ross 128 galaxy,

At such distances, it is almost impossible to observe an object a few hundred meters in size:

"Maybe she's also calculating the distance......

At this time, Yang Meng glanced back at the pebbles that gradually turned into points of light.

Watching the trail gradually move away, he shook his head gently.

As Xiaoguang said before,

The Ross 128 galaxy is there,

And the trail is moving away from this galaxy,

This is also the reason why he clearly speculated that the end of the trail was likely to be a decoy, and he had to catch up and take a look.

After all, he didn't know that it was the old suspicion that lured him away.

Or is it just so happened that she was leaving the galaxy at this time,

Anything is possible,

What he had to do was gather as many clues as possible that could be lost.

……

The process of returning is longer than the process of leaving.

After all, it's not an easy thing to make a fast-flying spaceship turn around.

He's going around a big circle from another time in the Ross 128 galaxy into the solar system.

"It's a bit of a hassle to re-enter this galaxy and find a place to moor a probe!"

In his opinion, this time sneaking into the Ross 128 galaxy,

It is no longer possible to park the spaceship in the vicinity of the Ross system in the same way as last time.

Need to find a suitable place to hide the ship,

He looked at the galaxy map of the Ross 128 galaxy simulated by Xiao Yin, and discussed this problem with Xiao Yin.

Soon Xiao Yin, with the five special solutions to the restrictive three-body problem in celestial mechanics,

Three suitable locations were identified,

They are the three objects of the Ross 128 planet and the sun, the spaceship, and the celestial mechanics constituted on the way,

The spacecraft can maintain a certain operation,

Lagrange points, L2 and L3

and the Langgrand site III with the Ross 128e planet and the stellar spacecraft,

Xiao Yin marked these three points on the star map for Yang Meng to choose,

"Lagrangian point?"

For humanity entering the interstellar age

This kind of knowledge is very basic middle school mechanics knowledge,

In the relationship between stars and planets,

Through force analysis,

It can be found that there are five points that can keep a small celestial body in a certain stable state.

that is, the three points on the line between the star and the planet,

These three points are located in the middle of the stars and planets, and on the outer side,

And the remaining two points are in,

The line between the planet and the star is the bottom edge, and the orbit of the planet forms the apex of the equilateral triangle,

There are two such vertices,

One is located in front of the direction of the planet's orbit,

One is located behind the orbit of the planet,

These five points are collectively called Lagrange points,

In the knowledge that Yang Meng has learned,

Human exploration and use of Langgrand points has been around for a long time.

As early as the stage of the development of celestial mechanics,

After discovering the properties of the Lagrangian L3 point located behind the sun,

I have guessed,

Will there be another Earth on the far side of the sun,

Because at point three,

If there is a celestial body,

Then this celestial body will move at the same speed as the Earth.

In orbiting the sun,

The two planets can never be seen,

Although physicists have repeatedly refuted the rumors,

stating that there can be no massive objects at point L3,

But there are still people who continue to speculate that behind the sun, which is opposite the position of the earth, there is another planet that cannot be detected by humans.

But with humanity starting in the 1970s,

Successively launching deep space probes,

With the observation of probes orbiting Mars, this speculation is rarely mentioned.

The time it takes for Mars to revolve around the Sun,

is almost equal to the time it takes for the Earth to make two revolutions around the Sun,

What is in the Earth's orbit in this case can also be seen clearly.

And in addition to the discovery that point three does not exist on the back of the earth,

Humans have also discovered in front and behind the Earth's orbital orbit,

That is, points 4 and 5 are followed by a group of asteroid belts that are moving at the same speed.

This amazing asteroid belt, also known as the Troyin Asteroid Belt.

And in these five Lagrangian points,

The most widely used by humans is,

The Lagrangian point 2 located on the back side of the line between the Earth and the Sun

Chang'e-2 and Chang'e-4, which were originally human explorations of the moon,

After the completion of the mission,

all went to the location of point 2,

Continuing the observation mission,

The Webb Space Telescope, which was launched later, also reached the position of point 2.

Because the light pollution of the earth is very serious,

This Lagrange L2 point is the most suitable place for astronomical observations.

With the development of human space technology,

An astronomical observation space station was also built here.

At the beginning, Yang Meng, who had just joined the work, had visited the Dian 2 Space Astronomical Observatory.

……

For a few Lagrange dots, in Yang Meng's mind,

Combined with the situation of this galaxy,

Yang Meng is more inclined to hide the spaceship to,

The position of point three,

Although the second point is located in the backlit area of the Ross 128,

It is very convenient to observe this Ross 128 planet,

But his ship is still too obvious,

Point 2 is too close to the position of Ross 128,

It's not very safe,

easy to notice,

The three previously launched probe satellites, hidden in the Lagrange point,

Because the size of the satellite is already small,

If it is a satellite-pointing cluster signal, it will not pass by the planet Ross 128 due to mistakes.

So even with an astronomical telescope,

It is also difficult to observe the presence of satellites.

Spaceships are different.

So think about it again,

Yang Meng still thinks that point three is more appropriate,

This point is behind the line between the star and the planet.

For the creatures on planet Ross 128,

This is equivalent to Yang Meng hiding behind the sun,

Under the shade of the sun,

The presence on planet Ross 128 is difficult to spot Yang Meng.

"But if you hide the ship at point three, it's a problem!"

The position of point three,

Indeed, so that the beings on the planet cannot see him,

But all the same,

At this point, which is at the same speed as the planet Ross 128,

He also couldn't see what was going on planet Ross 128.

fortunately

When Yang Meng chooses point three,

He also has some coping plans,

Now there is still a certain amount of time to enter the Ross 128 system,

Yang Meng also began to make some preparations for his plan.

Thinking of your own plans,

Yang Meng immediately got busy,

And Xiaoguang saw Yang Meng drifting to the equipment cabin again,

This time it didn't stop in front of the porthole, and went with Yang Meng.

After all, there is nothing outside the porthole, which is worthy of Xiaoguang's attention

……

In the equipment compartment,

Xiaoguang saw Yang Meng print out the equipment one by one,

and assemble it,

Somewhat curious, it finally couldn't help but ask about Yang Meng's next plan,

Yang Meng, who was busy, simply coped with Xiaoguang's two sentences,

A brief explanation of his plan,

"It turns out that there is such a relationship between celestial bodies!"

For the lack of knowledge of small light astrophysics, Yang Meng has already seen it,

Therefore, for such a statement, I did not pay attention,

And after Xiaoguang digested this knowledge,

Continue asking:

"According to what you said about the three-body celestial problem,

Points 4 and 5 are the most stable points,

Point 1, point 2, point 3 are unstable points, where natural celestial bodies cannot stay for a long time,

And the spacecraft launched there needs to carry a certain amount of energy,

Track trimming within a certain period!"

"So four and five are the best choices.

Why don't you choose these two points?"

"It is precisely because these two points are so stable that there are some asteroid objects in dense concentration,

Although this Troyin asteroid belt, which moves synchronously with the planets, moves at a speed similar to that of stars,

But it's more disorderly inside,

Especially in this galaxy!"

Hearing Yang Meng's answer,

The small light flickered slightly, as if he understood something,

"I see, no wonder you always found a gap and traveled through this galaxy before!"

Previously, when entering this galaxy,

Because this galaxy is in a state similar to the period of heavy bombardment,

In the perception of small lights,

The state of this galaxy is chaotic,

But now that Yang Meng has told it about this kind of astrophysics knowledge that will not be used in daily life,

It understands that in a galaxy,

Because of the relationship between various gravitational forces,

Small celestial bodies are stable

There is also a pattern to be found.

"So ......"

At this time, Xiaoguang still wanted to ask something,

Yang Meng, who was busy, saw Xiaoguang floating there very leisurely, so he said:

"Can you help me break down some of the materials?

I'd better build a detector and find my people!"

"Hmm...... Absolutely!"

The small light that was interrupted flickered,

As if to express some kind of emotion,

But thinking of another clansman who could help Yang Meng find him,

Xiaoguang's movements also became active.

……

Busy time always flies quickly,

Three months later,

Yang Meng drove the Boundless Oriental,

Returned to the Ross 128 system again,

Under the control of Xiaoguang,

The ship entered at a certain speed

Ross 128 stars, planets, and spacecraft composed of three Lagrangian points, point three,

Although it is a point,

But it's a big ellipsoidal area.

This area is very clean,

Because it's not a point of stability,

Even if there were other celestial bodies here,

With the passage of time,

Under the disturbance of other orbiting planets or stars, the objects here will slowly leave this area.

It finally fell

Point 4.5 area in front of or behind point 3,

And the little light on the spaceship,

Floating in front of the porthole to observe this area,

Seeing that it is very clean here, it also understands why human civilization likes to dock the probe to the point two area on the other side of the planet.

After looking at the surrounding scene for a while,

The little light drifted away from the porthole,

found Yang Meng, who was debugging the equipment in the equipment cabin,

"Now we're completely blocked by the star in front of us,

So how are you going to look at the planet behind the star?"

Hearing the question of the little light,

Yang Meng, who was debugging the equipment, stopped his movements,

Let Xiao Yin call up some data,

Looking at the data,

Yang Meng responded:

"Don't worry, there are many ways!"

Because the planet is so close to the star, only about 0.05 AU,

This makes the ellipse of five Lagrangian points very small.

To know an astronomical unit,

equivalent to the average distance from the Earth to the Sun,

is about 149.5 million kilometers,

At such a distance,

The five Lagrangian points formed by the Earth, the Sun and the small mass of the celestial bodies are very large.

Before the breakthrough of controlled nuclear fusion technology,

The most exploited by humans is the Lagrangian point between the Earth and the Moon,

And in this red dwarf galaxy,

Because it is a small galaxy, Yang Meng has a great calmness in detection.

The distance between point three and point four and five is not far,

Therefore, Yang Meng's first method,

It is to arrange a Fast-like signal reflector beam collector,

Such a device resembles a mirror,

Place it at points four and five,

The planets can be observed by detecting the principle of reflection.

But in consideration,

Although the detector can be stably arranged,

But the small celestial bodies that move relative to each other inside,

will have a certain effect on the mirror,

Yang Meng also plans to expand the scope of the mirror arrangement,

The distance of point two

Very close to the planets,

A large mirror placed there will inevitably attract attention,

But in this galaxy,

More than one planet,

And a few more planets,

These planets are all crammed into the range of one astronomical unit,

Stars and planets can also be placed on the Lagrange points of these planets.

"But there are a lot of limitations to the method of mirror observation!"

"So what else do you do besides this method?"

Xiao Guang, who was communicating with Yang Meng about the detection method, continued to ask.

Hearing Xiaoguang's question, Yang Meng nodded lightly,

"Mirror reflection is far less convenient than direct observation!"

"Little Light, your civilization used massive stars as gravitational lenses,

See what the earth is looking like?"

"So can you use this method here?" 、

Hearing Yang Meng's question,

I thought I didn't need to do anything about the little light that I was trying to detect things,

Seeing that Yang Meng needs their skills,

The little light flickered,

After a few more seconds of flickering, he replied:

"There are a lot of restrictions on how to use this technology......