In front of the battleship, a massive star system appeared in front of everyone. Ｘ

In the red-clouded interstellar space, four dazzling stars form a stable system of gravity, and these stars are in the same plane orbit, revolving around their common center of mass.

It's nothing short of a miracle!

The battleship's gravitational-wave radar soon revealed that the four stars had the same mass as the Sun, and the two largest were nearly three times the mass of the Sun, but they were all less than 500 million kilometers away from each other. What's even more surprising is that their orbits are also very peculiar, the outermost orbit of the sun is the fastest, the innermost orbit of the sun is the slowest on the contrary, the velocity ratio is constant, and they always maintain a plane quadrilateral with each other!

"The universe is so big, there are no wonders! There is such a strange quadruple star system! ”

On the bridge, Raven Draco said in amazement.

In astronomy, two stars orbiting around a common center of mass are called binary star systems or "binary stars", systems with more than two stars gathered together under the action of gravity are called "concentrating stars", a system composed of three stars can be called triple stars, four stars are called quadrats, and so on.

If there are more than ten or even a million stars, and they are physically connected to each other, they are "star clusters".

Alignments or clusters are not uncommon in the Milky Way, in fact, only two-thirds of stars alone like the Sun and one-third of stars are alignments or clusters.

For example, Alpha Centauri, the closest star to the Sun, is a triad.

"No, this is not a quadruple star, but a **star." Another deputy head of the group, Eugene, carefully looked at the data of the gravitational wave radar, pointed to the screen and said: "The two largest stars each have a companion star, and their mass and size are very small, and they are obscured by the light of the main star, so they cannot be seen clearly with the naked eye. ”

Everyone couldn't help but look at the screen, the picture slowly filtered the brightness, and gradually, two smaller stars appeared. They are only about one-tenth the size of the main star, and they orbit the main star like the moon orbits the Earth.

"This ......," Raven was dumbfounded, "it's unbelievable!" ”

Not only Raven, but everyone on the battleship had a look of shock on their faces. As long as you have an understanding of astronomical knowledge, you can understand the magic of this ** star system, or it is more appropriate to describe it as weird.

The orbits of the vast majority of star systems are chaotic, chaotic, and extremely unstable, with extremely chaotic gravitational fields. In particular, a triad star, if it is composed of three stars of comparable mass, raises the famous three-body problem.

However, the star system in front of me has broken people's common sense of astronomy, it is almost as if it is artificially set, and it is stable and ingenious.

After the shock, Zhuang Xiaolin ordered: "Search for the planets in this star system and find out the source of the signal." ”

The stars in the nebula are very young, only a few million years old, and they are **star systems, and under normal circumstances, planets cannot exist, because the planets are torn apart by the gravity of the surrounding stars before they are formed.

But the coordinates of the information he received pointed to this interstellar space, and the end of the route was also here, as expected, there should be planets around these stars, and the remnants of the super civilization that the other party said were on the planets.

This is normal logical reasoning, otherwise, could it be that the remains of a super civilization would be on the stars?

A few minutes later, the operator of the gravitational-wave radar excitedly shouted: "Found it!" But his face was extremely strange, and his eyes were wide as if he had seen a ghost.

"What's wrong?" Zhuang Xiaolin raised his eyebrows, and seemed a little dissatisfied with the fuss of this operator.

"See for yourselves."

The operator switches the data to the ship's public channel so that everyone can see it.

"it!"

"Oh my God......"

"Am I mistaken?"

The public channel of the battleship suddenly exploded, and a chaotic cry sounded, at this moment, everyone was shocked beyond measure, and couldn't help but burst into foul mouths to vent their inner complex emotions, and at the same time their eyes did not blink, staring at the holographic screen in front of them.

On the screen, a dark red planet slowly rotates.

This is a terrestrial planet, very inconspicuous in appearance, which can be found everywhere in the universe, and tens of billions of planets similar to it can be found in the galaxy alone.

However, it is not its size and shape that people are shocked by, but by the location it is located.

The data shows that the planet is located exactly at the orbital focus of the star system, which is the common center of mass of the six stars! In other words, those six stars orbit around this planet!

This is absolutely illogical and completely violates the laws of physics.

Planets revolve around stars, which is the iron law of the universe, but there is an incomprehensible scene in front of people's eyes, stars revolve around the planets, how is this possible?

A little thought shows that the center of mass of multiple stars is also the intersection of the gravitational field, where the gravitational effect is at its maximum, and no planet can exist. Not to mention a planet, even a star placed here will be torn apart in an instant, if it is replaced by a supermassive black hole, it can still be argued, but it is by no means a black hole, it is just a seemingly ordinary planet, not to mention that it also violates many common senses, it is simply impossible to count.

However, it is existence, and facts speak louder than all words!

Everyone on the battleship was suddenly in their hearts, no matter who saw this scene, they would suspect that this was the handiwork of a super civilization, and the probability of such a spectacle being born naturally in the universe was infinitely close to zero, and this must have been built by a super civilization!

It's hard to imagine what kind of civilization could have created such a miracle, moving multiple stars, resetting their orbits, and maintaining the existence of the planets in between!

How far has "their" technology got? Not even the Galactic Empire can do it!

The mercenaries' eyes were all hot, Zhuang Xiaolin did not hesitate, and ordered: "Don't be stunned, get close to the past, and collect planetary data at the same time." ”

"Yes." The battleship accelerated again and sailed in the direction of the planet.

Because this is the depths of the nebula, the most core area, every inch of interstellar space is covered with gas and dust, more than ninety percent are hydrogen ions, and nothing can be seen from a close distance, but looking at the distance, there is a faint red in the field of vision, which is the visible light excited by hydrogen ions by high-energy photons of stars.

The battleship is surrounded by countless hydrogen ions, and the greater the sailing speed, the greater the resistance, and the battleship's hull rubs against the hydrogen ions, forming a faint ionosphere, sparks splash everywhere, and the temperature also rises.

This is precisely the reason why it is difficult for the battleship to reach sub-light speed, and it is surrounded by stars, and under the interference of a strong gravitational field, the battleship does not dare to enter a warping state at all.

Fortunately, the planet is not far away, less than a billion kilometers, and it is enough to fly over it smoothly.

At first, the planet was not visible to the naked eye from the battleship, it was completely obscured by the glow of the surrounding stars. As the distance closes, a tiny bright spot appears in the background of the red nebula, like dust. Then the bright spot grew larger and larger, and soon expanded into a spherical shape, and after a dozen hours, the planet was completely revealed in front of people's eyes.

At this time, the battleship also collected data on the planet.

As previously observed, this is indeed a terrestrial planet, an approximate perfect sphere, about 5,000 kilometers in diameter, and very similar in size to Mercury in the solar system.

But its density is incredible, with a similar volume and a mass nineteen times that of Mercury!

You know, Mercury is second only to Earth in the solar system, and in addition to the thin crust of rocks on the surface, there is a huge iron core inside. In other words, Mercury is almost a big iron ball, but the mass of this planet is nineteen times greater than that of Mercury, and even more massive than Earth!

Because of its similar mass to Earth, the planet's gravity is similar to that of Earth, making a rotation every twenty-five hours in a west-to-east direction, the same as the six stars in orbit outside.

When viewed from space, the planet is always a dark red barrenness, with no moons in the sky, no oceans or vegetation on the ground, only a land of endless rocks, mountains and plains, canyon basins, and volcanoes and lava rivers everywhere, like hell.

Surprisingly, it has a thin atmosphere, but the oxygen content is extremely low, less than one percent, and humans can quickly suffocate to death when exposed to the air.

Even if there is enough oxygen in the atmosphere, ordinary people cannot survive on it, because the planet only has day, not night.

No matter where you are on the planet, at least two stars are shining at every moment, and the average surface temperature is more than 100 degrees Celsius, and ordinary people can't survive even 30 seconds without protection.

"There's something weird about this planet!" A mercenary muttered.

"Nonsense." The person next to him rolled his eyes, "Surrounded by six stars, the density is surprisingly large, can it not be weird?" ”

The mercenary before shook his head and said, "I mean, it's weird in temperature. ”

When he said this, everyone reacted. The vast majority of Union citizens have attended college, astronomy is a compulsory course, and they know everything about the planetary norms in the universe.

In general, the closer a planet is to its star, the warmer the Earth's surface will be. In the case of Mercury, it and the Sun average 58 million kilometers, with an average surface temperature of around 180 degrees Celsius and a maximum temperature of more than 420 degrees Celsius.

The planet is only 40 million kilometers away from the closest star, and the farthest one is only more than 300 million kilometers, and it is illuminated by six stars at the same time, and it is reasonable to say that its surface temperature is at least 1,000 degrees Celsius, and even the entire surface melts into magma would not be surprising.

But the data shows that its average surface temperature is just over 100 degrees Celsius, so where does the heat from those stars go?

Needless to say, the surface of the planet, under the intense radiation, even the temperature of space around the planet exceeded 40 degrees Celsius, and the star so close at hand that people couldn't open their eyes, just staring at it for three seconds can stab their eyes.

Everyone on the bridge looked at Zhuang Xiaolin, waiting for his decision.

Zhuang Xiaolin pondered for a few seconds and asked, "Have you found any buildings or spaceships that are suspected to be civilized on the surface?" ”

"Didn't find it." A battleship operator replied: "I have scanned many times, so far, I have found no very conspicuous artificial structures or things, and there are no signs of life, it looks like an uninhabited planet, but it cannot be ruled out that there is definitely none, maybe small, and it will take more time to search." ”

"What about the Federation's expedition ship?" Raven Draco couldn't help but ask, "There is no trace of other spacecraft in orbit?" ”

His question is exactly what many people want to ask.

The reason why the entire mercenary group traveled here across more than a thousand light years was because Zhuang Xiaolin received a message for help from the expedition ship. However, Zhuang Xiaolin seemed reluctant to talk more about the expedition ship, and the content of the information was also vague, and there was nothing useful except for the coordinates and route.

Now the mercenary group has arrived in the depths of the nebula thousands of miles away, but they haven't even seen the shadow of the other party. If it weren't for the unreasonable star system in front of us, everyone would have thought that they had been deceived and ran away in vain.

However, the operator still shook his head, if there was a spacecraft in space orbit, it would have been discovered long ago.

Everyone on the battleship looked at each other, and a strange atmosphere spread everywhere.

Xin Lone, who was sitting in the room, didn't look good, and his telepathy had started to work since the battleship entered this star field. There was a faint danger approaching, not very strong, but he couldn't lock on to the source of the danger, and it seemed to be everywhere, and this feeling made him very uncomfortable.

If he could, he would immediately turn the battleship around and leave.

But the others on the battleship did not have the same sense of silence, and none of them perceived the danger.

Zhuang Xiaolin broke the silence and ordered: "First release the satellite to form a communication network, and then the battleship will circle the planet a few times, maybe there will be a discovery." ”

The mercenary group nodded silently, and the head of the regiment was still very cautious in his actions, and did not send people to land on the surface of the planet.

The battleship quickly adjusted its direction and speed, and after more than an hour, it entered the low-altitude orbit of the planet and became a satellite of the planet, and began to orbit the planet. At the same time, the warship continued to release reconnaissance satellites the size of a head, and after a circle, dozens of satellites were in place, forming a complete communication network in space, and at the same time transmitting a large amount of surface data.

Soon, an operator shouted in surprise: "Commander, there is a discovery." ”

All eyes on the bridge were focused on a topographic map on the holographic screen. This is taken by a certain satellite, very clear, it is easy to see that it is a plain, as the picture continues to enlarge, gradually, several artificially formed symbols on the plain appear.

At first glance, everyone recognized that these were two federal words: "Don't".

They were made of huge stone blocks, and the size of each word was more than three hundred meters, calculated at map scale, and the font was very messy, as if it had been done in a hurry. After the "don't", there are six slightly smaller texts, one line each for two words, which are "accelerate", "turn around" and "fire", with no punctuation.

These eight words are combined into one sentence: "Don't accelerate, don't turn around, don't fire." ”

All of a sudden, everyone was struck by lightning,