After sensing that foreign matter had entered this star system, Xiao Yu reacted quickly.

Xiao Yu controlled a village-level spaceship and quickly approached the alien meteorite block.

Material analysis showed that the meteorite block was composed mainly of iron, mixed with some dry ice and ethane. It has a volume of only about ten meters by six meters by three meters, and a mass of only a few thousand tons.

The closest star to this star is also hundreds of light-years away, at the edge of the Milky Way, where the material is very thin. This meteorite block may have formed in a nascent star system inside the Milky Way, and then was thrown out during the gravitational battle, and after a long journey of tens of millions of years, it came here and happened to be captured by this star.

This meteorite block is very common, and can be found everywhere in some nascent star systems. But when it appears here, it has something unusual in its senses.

The first thing that can be proven is that the gravitational effect of this star is not shielded. In other words, the star can still attract objects outside the barrier.

Of course, it is also possible that gravity has been shielded and the asteroid's arrival was just an accident - but this possibility is so small that if gravity is excluded, it is as difficult to get this meteorite block into the shili range of this star as it is to shoot a mosquito a light year away with a pistol.

This possibility is negligible.

This phenomenon caused Xiao Yu to be worried.

In order to prevent some accidents, such as the meteorite block has some special structure, Xiao Yu manipulated the spaceship, marked the meteorite, and began to try to push it out of the star system.

As a result, after this meteorite block came into contact with the red barrier. Like some of the village-level spaceships used for experiments before, they suddenly disappeared.

But the connection remains. Xiao Yu has already installed a communication instrument on top of this meteorite block.

Xiao Yu commanded the radio broadcasting instrument that had been placed on this meteorite block in advance, and sent out a broadcast. Then, under Xiao Yu's indescribably complex psychology, Xiao Yu arranged the satellite in this star system and received the broadcast signal.

This suggests that it did not leave the galaxy, but was teleported into the interior of the galaxy like those village-level ships.

"Are you allowed to enter or not to go out?" Xiao Yu sighed in his heart. "This barrier seems to allow only external substances to enter, and not to allow internal substances to go out. If that's the case......"

"If it's really allowed to enter and not to leave, I should still be able to see the starlight from the outside world. There is no reason why meteorite blocks can come in, but starlight from the outside world can't get in. ”

Xiao Yu pondered. Various optical observation instruments were realigned to this barrier.

The position where the array telescope is aligned. It is the location of the silver heart in Xiao Yu's speculation. This location is the brightest.

The array telescope took an extremely high-resolution photo. In this photo. Xiao Yu carried out a lot of processing work, and after matting, noise reduction and other means took turns, Xiao Yu got a blurry photo.

After removing the light of the red barrier, Xiao Yu can be seen faintly, in the center of the photo. There is a vague bright spot.

This highlight is undoubtedly the Silver Heart, the heart of the Milky Way.

"Sure enough, I wasn't cut off from the outside world. Matter from the outside world, even light, can still enter this star system, and the starlight cannot be observed before, because the light influence of the barrier is too strong. Xiao Yu came to a conclusion, and then, he felt a little weird in his heart.

"How can this feature be so similar to a black hole? If there were an outside observer who could not go out after they saw any light entering the area, and where they could still detect the gravitational force, would they mistake it for a black hole, and the location of the barrier for the horizon boundary of the black hole? ”

The event horizon boundary is the gravitational edge of the black hole. Above the horizon border, escape at exactly the speed of light. Because the speed of light is the upper limit of physical motion, light can still escape outside the horizon border, and after entering the horizon border, the escape speed exceeds the speed of light, and the light can no longer come out.

It can be simply understood that the horizon border is the edge of the black hole, and there is still a possibility of escaping before reaching the horizon border, and after entering the horizon border, it is dead and can no longer escape.

"But this is clearly not the hallmark of a black hole. For example, when approaching a four-dimensional barrier, matter is not torn apart by gravity. If an outside observer were to do so, it would be easy to tell that this is not a black hole. ”

"In short, I'm never sure if I'm really as safe as Taeho said. Ahead, there are always crises, and getting out of here as soon as possible is the right way. Xiao Yu thought to himself.

"Huh? Xu is not allowed to enter or exit, Xu is not allowed to go out......" Xiao Yu silently muttered this sentence, and a little inspiration suddenly appeared in his heart.

"Taihao said that if I can break through this barrier, I will be able to master the four-dimensional protective shield jishu. Originally...... Four-dimensional protective shield, that's what it's all about. At this moment, Xiao Yu had a feeling of sudden realization.

"This four-dimensional barrier, for the things inside it, is allowed to enter and not to leave, so it is obvious that it is allowed to enter and not allowed to enter for the external shijie. Wouldn't it be just right if this feature could be used to arrange such a four-dimensional barrier on the outside of the spaceship? ”

"First of all, the external attack of the spaceship, because of the principle of allowing the unallowed, can easily penetrate this four-dimensional barrier, so as to attack external objects, and the attack sent by the external spaceship, whether it is a light attack or a physical attack, will not be able to enter because of the same principle, that is, it cannot hit your own spaceship. This, such a jishu, is really too strong, if I master this technology, wouldn't it be invincible, and there is no existence that can destroy my spaceship? ”

After thinking of this, Xiao Yu's heart became excited.

"I didn't expect that the gift Taihao gave me would be so valuable. Well, this gift is so important to me. As a token of gratitude, I have decided that after my technology is sufficiently advanced, I will definitely follow your last wish and make a trip to the Great Magellanic galaxy to fulfill your wish. ”

Xiao Yu secretly made up his mind.

Taihao's last wish is not simple to say, and it is not difficult to say that it is difficult.

Just when Xiao Yu's heart was just excited, in an instant, Xiao Yu thought of two other aspects, and the excitement in his heart quickly calmed down.

"First of all, Taihao itself, which is a semi-four-dimensional structure, was smashed into the four-dimensional structure by the neutron battle star of the Sweeper civilization, resulting in its death, which indirectly proves that the four-dimensional maintenance shield is not omnipotent, but has some kind of limitation. The most likely is that there is a maximum limit on energy, which means that after I master the Quad Shield technology, my ship is immune to all attacks below a certain level, but when the attacks exceed that limit, the Quad Shield can still be shattered. ”

"Secondly, the nature of not allowing entry will also make the spacecraft completely unable to collect external information. Obviously, since the outside world cannot be attacked, the information from the outside world cannot be entered. As a result, the spacecraft will not be able to communicate with each other with radio waves, and it will be impossible to locate the enemy spacecraft through the neutron star positioning system...... To put it simply, anything on the outside will be completely invisible to my ship, because the internal light can go out, they can clearly see my position, and because the outside light can't come in, I can't see them. Are these two things...... Well, the communication problem can be solved through ultra-distance communication technology, and the intelligence problem can only be solved by launching a large number of satellites. ”

Xiao Yu quickly thought through the advantages and disadvantages of the four maintenance covers, and initially conceived some battle modes after mastering the technology of the four maintenance covers.

To put it simply, after mastering the four maintenance covers, Xiao Yu's battle mode should be like this. That is, to launch a large number of satellites without four maintenance covers to take on the task of detecting the enemy's situation, to obtain all the information about the enemy, such as the spacecraft's position, movement direction, firing direction, volume, mass, fire intensity and other information, and then through the means of over-distance communication, all this information is sent to the flagship spacecraft that activates the four maintenance covers. The flagship ship then processes this information and directs the rest of the ships to fight through over-range communication.

Because of the appearance of the four maintenance covers, Xiao Yu will have to completely separate the intelligence aspect and the combat aspect, making them two independent parts.

It's a disadvantage, but it's clear that the disadvantages are negligible compared to the benefits.

"I don't know what level of technology I can reach before I can escape from this cage and master the technology of the Four Guardians." Xiao Yu pondered, "It should be faster-than-light navigation technology, faster-than-light navigation is achieved by distorting three-dimensional space, I don't know if the distorted three-dimensional space will have an effect on four-dimensional space...... Leave it alone for the time being, and after the development of the faster-than-light navigation jishu, it will be clear to conduct an experiment. ”

Xiao Yu made up his mind, and in the Hebei, he began repeated shiyan and data calculations.

Luca can relax and celebrate, but Xiao Yu cannot. Besides, even if Xiao Yu wants to have some fun and relax and entertain, there are no related entertainment activities to do. Because no matter what kind of entertainment activities it is, for Xiao Yu, it's just a bit of a data entanglement, which is really boring. (To be continued......)

PS: The second shift arrives, and the third shift is at seven o'clock in the evening.