Even if Chen Yue was mentally prepared, the change at this moment made him feel a little surprised and surprised.

Until it tried to salvage it itself, it had remained in its original form. But now, this spaceship, which has adopted its own third-level civilization technology and is made of advanced materials, is like a sand castle, and a slight gust of "wind" will directly blow it to pieces.

The large pieces of wreckage were gone, so Chen Yue could only salvage some small wreckage, bring it to the laboratory, and start observing it through various instruments and equipment.

Under this look, Chen Yue immediately found that the spaceship structure, which was originally based on special iron-nitinol, was mixed with a large number of impurities at this moment, and began to become loose and porous, and fragile. Not to mention the electromagnetic cannon projectile, even if Odo, a dwarf, comes, it can be easily broken.

"It seems that I still underestimated the impact of cosmic rays on metal materials at high speed."

Chen Yue thought secretly, "Fortunately, I have an energy shield. Otherwise, after traveling at 55% of the speed of light for so long, all my ships would have to be scrapped. ”

Chen Yue had already determined the reason why the ferry ship had become like this, and he had also confirmed the culprit who caused all this.

Interstellar medium.

In interstellar space, far from the stars, matter is very thin. At low speeds, they have little effect on macroscopic objects. But if it's fast enough, like the human fleet that has reached 55% of the speed of light at the moment, then it's different.

At this speed, the otherwise unremarkable and harmless interstellar medium will also become violent.

Free neutrons, alpha particles, beta particles, molecular clouds, tiny interstellar dust, and so on and so forth.

Just as a small bird crashing into an airplane can destroy an airplane's engine, these small things hitting a spacecraft traveling at high speed can trigger an extremely violent reaction, even a nuclear reaction.

The chemical bonds of the molecules and atoms of the metal materials that make up the outer shell of the spacecraft are directly broken. The protons and neutrons in the nucleus of the atom will also be knocked out, through the nuclear fission mechanism, or a few more protons and neutrons, which is nuclear fusion, from one element to another.

This is where the inexplicable impurities in the ship's hull come from.

The fission or fusion of metallic elements changes the type of element and changes the properties of the material. The impact of extremely high energy causes the material to lose its original properties. The mixing of a variety of impurities makes the material loose and porous, and it will break if it is broken slightly.

If sub-light sailing was forced before the development of energy shield technology, then this ferry ship would be the end of those vehicles.

With the Energy Shield, it's different. Except for electromagnetic waves, most of the rest of the radiation and particles will be deflected by the energy shield, and they will not be able to hit the spacecraft, and they will not be able to affect the performance of the spacecraft's hull materials.

After this experiment, Chen Yue feels that his accumulation in applied physics, engineering, and materials science has increased a little. There is a little more insight into the development direction of future science and technology.

After that, Chen Yue began to conduct more experiments and more types. He began to throw a number of different materials out of the energy shield, let the high-energy cosmic rays and interstellar medium bombard them, and after a while, he retrieved them to see which material had better performance.

It's an interstellar voyage, but it's also a scientific journey, an experimental journey.

Chen Yue will never let go of any opportunity to improve his scientific and technological level.

Time passed slowly, and in the blink of an eye, years passed. During this time, the latest model of high-speed ion engine was finally developed. Chen Yue immediately started the production line and actually manufactured it.

The newly improved high-speed ion engine has been tweaked in many ways, with a particular focus on improving its resistance to high temperatures and radiation. Of the more than 100,000 problems in total, Chen Yue solved about 80,000 by adjusting the structure and focusing on optimization.

As for the remaining 20,000 problems, there is no way to solve them for the time being. The reason why it cannot be solved is partly because the existing technology is really unsolvable, and partly because of material constraints, it is impossible to carry out large-scale research.

However, Chen Yue also tried his best to avoid these problems through structural design.

The latest model of the engine is far from being mature, stable and reliable, at least far worse than the engine that can run stably for thousands of years in the Southern Star Civilization, but at least it is much better than the previous engines that were scrapped after only working for more than 20 years, and they are barely usable.

Follow-up improvement, just wait for the future environment to stabilize and then slowly study it.

At this moment, there are still two years left before the scheduled deceleration time. This meant that during the two-year period, all engine replacement and installation had to be completed by himself.

As a result, in the brilliant universe with one side blue and one side pitch black, the human fleet, which seemed to be suspended at rest, was busy again.

Numerous ferries shuttle between the space carrier and the heavy transport ship, transporting the engines to the installation location. Hundreds of thousands of robots and tens of thousands of Three-Eyed engineers worked together to install these newly built engines.

When everything was done, the scheduled time for deceleration was up.

At this moment, the human fleet, which had maintained a state of inertial navigation for ten years and sailed a distance of 5.5 light years, finally made a big move.

Under Chen Yue's control, more than 400 large spaceships started their attitude adjustment engines at the same time, changing from facing Wang Liang's three-star system to facing away from Wang Liang's three-star system.

"Slow down...... Initiate! ”

Chen Yue issued an order. In the next moment, nearly 10 million high-speed ion engines that were newly replaced or overhauled, or maintained shot out at the same time.

The gravity equivalent to one-50th of the Earth's gravity, which had been lost for ten years, reappeared in every spacecraft.

Ahead, human civilization awaits a distance of nearly 7 light years, and a long voyage of up to 26 years.

The human civilization fleet began to slow down.

However, in the process of deceleration, the direction of the tail flame spray of the human fleet was not directly facing Wang Liang's three-star system, but there was a slight deviation.

This slight angular deviation, after a long distance of nearly 7 light-years, will cause the human fleet to finally reach another star system, not Wang Liangsan.

The name of that galaxy is Wells 0350-5658.

Time flies, and years pass in the blink of an eye.