Start sweeping the universe by rubbing the CPU with your hands.

Decades later, the fleet carrying Han Yang's brain tissue arrived at the edge of the star system.

Han Yang has not entered this galaxy, and there is no need. Because under his control, the fleet used to launch intergalactic voyages has arrived at the edge of the star system in advance.

Han Yang has prepared 10 large space carriers here, as well as tens of thousands of supporting supplies, equipment, special spacecraft, etc.

At this moment, the two fleets finally converged. Han Yang's brain tissue was also transferred to the most core spacecraft in the fleet under heavy protection.

This is a comprehensive spacecraft. It has some combat effectiveness and good defense capabilities, as well as some engineering capabilities. It is also large enough to accommodate numerous industrial equipment inside.

The number and types of these industrial equipment are so large and complete that a complete industrial system can be built.

Although it is not so complete and lacks some high-tech special equipment, there are only some universal, most important and basic equipment, and the scale is not large enough, but in Han Yang's opinion it is enough.

Moreover, this is only the equipment loaded in this spacecraft. There are more industrial machines on the remaining transport ships, space carriers, etc.

After ensuring that all preparations were completed and all spacecraft and supplies were transferred to the space carrier, the fleet set off as scheduled.

A total of ten large space carriers entered the super-light navigation state at the same time, and began to move towards the vast starry sky at a speed of 80 times the speed of light, and sailed continuously and uninterrupted for 30 years.

The distant distance of 2400 light-years was spanned by Han Yang.

The original star system is already at the edge of the Milky Way. Stars are extremely sparse there. Now 2400 light-years away again, the shadow of the star is no longer visible from the outside.

Judging from the absolute distance from the Milky Way, at this location, there are also some stars in other directions of the Milky Way.

Those stars or ultra-high-speed stars, that is, they were thrown out in the internal gravitational battle. They have a high speed of nearly a thousand kilometers per second, which is enough to break away from the gravitational pull of the Milky Way. From then on, they head towards the direction away from the Milky Way, taking them with them. Running wildly along the planets around him, he will never return to the Milky Way.

Or some have lower speeds, but during the long gravitational changes, they gradually moved to the edge of the Milky Way and obtained a stable orbit. Like the "satellites" of the Milky Way, they began to orbit the Milky Way.

There are even some stars that are approaching the Milky Way at extremely high speeds.

Han Yang has reason to believe that those stars are not actually native to the Milky Way. They may have been born from other river systems and were eventually thrown out through similar internal gravitational battles, or they may have been simply affected by the gravity of the Milky Way and directly "plundered" from other river systems, forming the current formation. Such a peculiar track.

But these stars at the edge of the Milky Way, or outside, have one thing in common, that is, they are extremely rare.

The average distance between two such stars can even be as high as more than a thousand light years.

Compared with the original sun, there was a density of 15 stars within only ten light-years of distance around it. At this moment, the density of stars is so sparse that it is as if there are no stars at all.

The distribution of stars in the Milky Way is just like the Earth's atmosphere. There is no obvious dividing line between it and the outside world, but it gradually becomes sparse.

At this moment, the density of stars has dropped to such an extent that no matter from any aspect, it can be considered that it has left the Milky Way.

At this distance, Han Yang's fleet broke away from the super-light speed navigation state.

A super-light voyage of 2400 light years is Han Yang's limit at this moment. For the rest of the voyage, we can no longer sail at super-light speed.

Because at the time of departure, most of the billions of tons of materials and fuel that Han Yang carried had been consumed. The density of stars here is too low and too far away, and Han Yang can no longer obtain supplies.

But there is good news at the moment. The good news is that about 500 light-years away from the current position and not far from Han Yang's orbit, there happens to be a lonely star that is rushing away from the Milky Way at about 1200 kilometers per second.

According to observations, there are three massive planets in that star system with sufficient material.

If he can get there, Han Yang will be able to obtain enough supplies and once again sail at super-light speed to span a distance of more than 2400 light-years. In this way, he can save more than 2000 years in the total voyage.

But there is also bad news. The bad news is that Han Yang cannot go to that star system to obtain supplies.

The reason is also because the location of that star system is so suitable, so suitable that it is like a forward supply base specially built for voyages to the Canis Major dwarf galaxy.

In such a suitable star system, you can tell with just your buttocks that there must be the surveillance power of the founder civilization. If you dare to go to that star system, you are seeking death.

In this way, Han Yang had to give up his plan to obtain some supplies, and honestly followed the original plan, giving up super-light navigation at this distance node and switching to conventional navigation.

Thus, the regular acceleration phase begins.

The long-sleeping conventional thrusters without working materials began to emit bright light, pushing the heavy space carrier to slowly accelerate.

This acceleration took more than two years, and the speed of the entire fleet was finally increased to 99% of the speed of light.

Han Yang did not intend to continue to increase his speed. If it is further improved, the resources consumed will not be directly proportional to the final harvest, and the economy will be lost.

For such a long voyage, economy is the most important indicator. Han Yang must make the strictest balance between time and resources to finally complete the voyage.

Otherwise, even if Han Yang only brought a brain with him on this voyage, there would be no hope of completing it if the supplies consumed were many times less than those required by normal intelligent life.

At this moment, at a speed so close to the speed of light, time is passing at an extremely strange speed.

Han Yang noticed that for every year that passed by the outside world, that is, when he sailed about a light-year distance, the time he perceived was only about 51 days.

This seems to have such a consequence: I feel that only 51 days have passed, but I have sailed a distance of one light year. It seems that I have exceeded the speed of light during normal navigation.

But the actual situation is obviously not the case.

The closer the speed is to the speed of light, the slower time passes, and at the same time, the distance between two places will also shorten. Therefore, he did not actually sail a distance of one light-year, but only a distance of about 51 light-days.

The reason why the distance you perceive is different from the outside distance is because the change in your own speed leads to the change in distance. Or you can say that 99 light days of yourself at 51% of the speed of light is approximately equal to one light year of yourself at rest.

The changes in space and time are so wonderful. After entering the regular navigation stage, Han Yang also verified a conjecture in the secret power theory of the fifth-level civilization.

Dark force theory shows that the basic principle of over-distance communication is based on the interaction between dark matter and apparent matter, or in other words, based on the interaction between space and matter.

There is only visible matter and no dark matter, so long-distance communication is not available. There is only dark matter, no visible matter, and long-distance communication is also unavailable.

At this moment, thousands of light-years away from the Milky Way, apparent matter has become thin to a certain extent. There isn't even much interstellar dust.

There is only some interstellar high-energy radiation in space - most of which comes from the interior of the Milky Way and particles such as microwave background radiation.

In comparison, the amount of dark matter is extremely large.

There is a huge dark matter halo surrounding the Milky Way. Its farthest point even extends to 100,000 light-years away, which is larger than the size of the Milky Way itself.

We are obviously in this dark matter halo at this moment, so there is no shortage of dark matter.

In the previous galaxy, Han Yang deliberately left some receiving ends for long-distance communication. At this moment, Han Yang started communicating with it.

Under Han Yang's control, some detectors began to transmit back the detected scenes.

Over-distance communication is still available.

But Han Yang clearly noticed that the quality and speed of long-distance communication at this moment were significantly lower than when they were within the Milky Way. Moreover, after several more years of sailing, the reduction in quality and speed is even more obvious.

From here, Han Yang estimates that after about 5000 light-years from the edge of the Milky Way, long-distance communication may not be available.

The technological level of at least a level 5 civilization is no longer available. As for the sixth-level civilization level, there may be other technologies that enable long-distance communication, but that is not something I can know.

Time passed slowly, and thousands of years passed in the blink of an eye.

Of course, this is external time. For Han Yang, the time he perceived was only about 140 years.

The navigation distance he perceived was only about 140 light years, but he also knew that to the outside world, he had sailed 1000 light years.

During this long voyage, Han Yang truly realized the impact of interstellar high-energy radiation on the fleet that he had never paid attention to in the past.

On this voyage, one of the more important materials Han Yang carried was a special radiation-proof film.

This radiation-proof film will be laid in front of each spacecraft, covering any exposed hull.

Generally speaking, matter will not react with it in the interstellar vacuum. No matter how long it exists, it should be as good as new. But the real situation is that after thousands of years of sailing, the properties of this radiation-proof film have changed dramatically.

They are no longer tough, but become like old clothes, which will be torn at the slightest tug. They were no longer smooth and transparent, but gradually lost their flatness, and the surface began to be filled with things similar to bubbles.

Although they originally did not contain any metal elements, trace amounts of metal could even be detected inside, and a slight amount of radioactivity could also be detected.

Interstellar high-energy radiation particles change their properties from microscopic to macroscopic during long-term collisions with the particles that constitute them. Even some particles have changed from one element to another due to the impact of foreign particles and the addition of protons or neutrons in the atomic nucleus.

Han Yang knew that if his spacecraft was not covered with such a radiation-proof film, then it would no longer be these protective films that would undergo such changes in properties, but the armor of his spaceship.

Han Yang removed the damaged protective films and threw them into the fuel room to be burned. He took out the originally reserved protective films and pasted them on the outer shell of the spacecraft again.

Today, the total quality of Han Yang's fleet has dropped a lot. In fact, all the original reserve energy has been burned, and what is burning at this moment are the parts that make up the spacecraft.

When there is sufficient energy, the many spacecraft carried by Han Yang are vehicles. When energy is insufficient, those spaceships are dry food during the journey. Just like in the ancient earth era, some grassland nomads would carry a large number of cattle and sheep with them when they went on an expedition.

Generally speaking, Han Yang, who is in inertial navigation at this moment, does not consume much energy. But the fact is that due to the continuous collision of interstellar dust and interstellar radiation, the fleet's sailing direction will continue to undergo slight deviations and continue to accumulate.

Whenever the offset accumulates to a certain stage, Han Yang must start a thruster to correct the offset. Otherwise, the fleet will not be able to always aim in the direction of the Canis Major Dwarf Galaxy, and will definitely miss it, or even miss the mark.

This correction is not much in an absolute sense. But if it extends to such a long journey, even tens of thousands of light years, it must not be ignored.

And this is also the most important consumption in regular inter-river navigation.

Time is still passing slowly. In the blink of an eye, another thousand years have passed, and then another thousand years have passed.

At this moment, the material density around the fleet was much thinner again than before. This causes the efficiency of long-distance communication to be greatly reduced again. The communication efficiency with the previous star system was so low that it took only an hour to transmit 1KB of information.

Han Yang knew that the time when long-distance communication was completely unavailable was no longer far away.

By then, even long-distance communications within one's own fleet will be unavailable. At that time, I can only use conventional electromagnetic wave communication.

Because the overall quality of our own fleet is too low to support the strength of the interaction force required for long-distance communication.

At this moment, Han Yang is about 5300 light-years away from the edge of the Milky Way as he defines it.

It is still about 4700 light-years away from the space oscillation monitoring network discovered by the Greenoka civilization and shaped by the founder civilization, spanning the Milky Way and the Canis Major dwarf galaxy.

At this distance, Han Yang conducted the last communication with the Greenoka fleet.

"My friends, what happens next depends on you."

Two hours later, Han Yang received a complete reply.

"You just need to move forward boldly and bravely. We are here for everything else." (End of Chapter)