At this moment, Chen Yue even felt that his fleet was sailing in a rainbow.

As we all know, the rainbow has seven colors, red, orange, yellow, green, blue, purple. At this moment, the color of the universe in front of Chen Yue underwent a similar change. The universe presented in front of Chen Yue was first red, then slowly turned orange, then yellow, and then blue.

At this moment, what appeared in front of Chen Yue's eyes was a blue universe.

The vast universe is blue, like a vast ocean. A small human fleet set sail in this ocean.

Chen Yue knew that if the speed of the human fleet increased again, the color of the cosmic microwave background radiation would also turn purple. If you raise it again, the purple color will disappear and the universe will be completely black, and you won't be able to see anything.

Because the light in front of you has broken away from the scope of visible light due to the excessive speed of your own light, it has become ultraviolet light. If you raise it again, it will turn into X-rays until it becomes gamma rays.

Gamma rays are the most energetic light.

If the speed of the fleet continues to increase, the energy of the gamma rays will become stronger and stronger, stronger and stronger, until no protective measures can resist it, and the final result will be the destruction of the ship.

But Chen Yue is not worried about that problem. According to his calculations, this would not happen unless the ship was traveling at more than 99.99% of the speed of light. And at this moment, he simply does not have this ability.

He even thought that even a fourth-level civilization did not have this ability.

It is highly likely that the fourth-level civilization has mastered the technology of faster-than-light travel. But that is to circumvent the limit of the speed of light by other means, and not to accelerate to the speed of light in space.

At this moment, the human fleet has reached the predetermined speed, reaching 55% of the speed of light, which is about 165,000 kilometers per second.

At this moment, the spacecraft engine, which had been running continuously and spraying high-speed plasma into the rear for 26 years, finally went out.

It lasted for 26 years, enveloping every corner of every spaceship, equivalent to about one-50th of the Earth's gravity, because of the cessation of acceleration, it disappeared in an instant at this moment.

In 26 years, in order to accelerate to this speed, the human fleet has traveled a total of 7 light-years.

Wang Liang's three-star system is only 19.5 light-years away from the solar system. At this moment, the acceleration alone has traveled 7 light years. Subsequently, when it is about to reach Wang Liang's three-star system, the deceleration will also take the same amount of time, and it will also sail the same distance.

All told, the distance that would require a human fleet to travel at 55% of the speed of light is only 5.5 light-years. And this will take 10 years.

26 years of acceleration, 10 years of inertial navigation, and 26 years of deceleration, for this distance of 19.5 light years, the human fleet will sail for a total of 62 years.

There is no way, interstellar voyages are so troublesome. It's too vast and too empty. The stars are just too far apart.

After stopping acceleration and entering the inertial navigation mode, Chen Yue immediately operated countless robots to conduct a comprehensive inspection of each engine.

This was the first time Chen Yue had made such a long-distance voyage. It is also the first time that the engine manufactured by Chen Yue has worked continuously for such a long time.

Even if he had conducted many simulations before, Chen Yue was still a little worried in the face of this actual voyage.

The final test result made Chen Yue's heart full of sighs.

He saw that after 26 years of continuous operation, almost more than 80% of the engines had serious failures. About 30% of the engines are completely scrapped, and there is no value for overhaul.

They were in a stable state of operation, and they were barely able to keep working. Once stopped at this point, it was impossible for them to start up again.

"Material technology is still a bit out of the mark. The manufacturing precision is also insufficient, and the wear is beyond expectations. In the environment of strong radiation and high temperature, the engine material has a brittle deformation, and it is impossible to repair the ......"

After 26 years of continuous work, all the problems that were hidden under the surface and could not be discovered by Chen Yue were exposed.

"Fortunately, I was prepared and stocked up on the relevant parts in advance, even in the foundry. Then take advantage of the ten years to build a batch of new engines. ”

In addition to the most important engines, the rest of the large spacecraft, such as heavy transport ships, space carriers, and dwarf planetary combat ships, were also exposed to some problems due to the long voyage.

Chen Yue also did not let them go, but collected all the problems, made a detailed list, and immediately tackled a total of more than 100,000 problems on this list, trying to solve them, and then either repair them, or apply them to the manufacture of new engines.

In this precious ten years, Chen Yue is destined to spend it in a busy situation.

In addition to being busy, Chen Yue did not forget to take advantage of the special environment at the moment to conduct some related experiments.

Such a high-speed environment is rare, and it is impossible to reproduce it in normal times, except for interstellar voyages at the moment. Even if it is forcibly reproduced, it will be extremely troublesome.

One of them is the experiment on the effect of cosmic rays on spacecraft materials under high-speed navigation.

At this moment, all of the 446 large ships were protected by energy shields. Many small spaceships, such as warships and ferry spaceships, are also protected by the energy shield of the space carrier.

Chen Yue manipulated a small ferry spaceship, causing it to go out of the range of the energy shield of the space carrier where it was located, directly exposing it to the space environment, and then ignored it.

At the moment the fleet is in a state of inertial navigation. Although the small ferry ship has no power, it can still follow the fleet and not get separated.

In this way, it relied on inertia and sailed with the fleet for a full year.

A year later, when Chen Yue tried to operate it again, he found that the spaceship had lost its response to his commands. It seems that all of its communication equipment has been malfunctioned and destroyed.

Chen Yue had no choice but to send another spaceship to salvage it.

The salvage ship has several robotic arms on it that can be grabbed directly and towed to the dockyard for inspection.

However, what Chen Yue didn't expect was that the mechanical arm had just clamped a bulge of the ferry spaceship, and just as he wanted to bite and fix it, the metal bulge on the ferry spaceship was directly clamped.

Chen Yue directly controlled the salvage spacecraft, propped up a large net, and planned to drag it directly over. But as soon as the net was forced, the ferry ship collapsed directly.

It shattered into tens of thousands of pieces, never to regain the shape of the original spaceship.