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

At this moment, around the earth, ten huge space carriers, each with a length of more than ten kilometers, have been parked in place. Tens of thousands of Stardust-class, Nebula-class, and Asteroid-class battleships are slowly maneuvering into the space carrier's berth.

These so-called berths are the "steel pipes" extending from the core hull of the space carrier.

These warships will hang themselves on these steel pipes and fix the hull with special steel cables.

On average, an air space carrier can carry about 6000 warships of various types. Han Yang built 50 aerospace carriers, which can transport about 30 warships.

However, Han Yang did not intend to transport so many warships. After all, this is an interstellar expedition, and the space carrier also needs to carry a lot of fuel and supplies.

The saved transportation capacity was used by Han Yang to load fuel and supplies.

One battleship after another hung on the space carrier, and a chilling atmosphere continued to spread in the space.

This scene was presented through live television to every human being who cared about this interstellar expedition.

The head of human civilization, Han Liang, also appeared in front of people.

In front of the camera, Han Liang looked solemn and serious.

“Compatriots, comrades-in-arms.

Facts have proved that in this vast universe, the only one who can protect us is ourselves.

The space for the survival and development of human civilization also needs to be fought for by ourselves.

Our hatred also needs to be avenged by ourselves.

Hundreds of years of colonization by the Ita civilization have brought profound suffering to our civilization. But at this moment, only some front-line colonists such as Malentin paid the price.

The real culprit is still alive and well in the Eta galaxy.

They ate my flesh, drank our blood, and used our blood and tears to build the glory of their own civilization.

If we don’t collect this blood debt, it will be impossible for the Eta civilization to repay it.

That being the case, then, I, the head of human civilization, Han Liang, hereby solemnly declare that the expedition of the human civilization expeditionary force to the Eta galaxy to repay the blood debt begins now! "

At this moment, the entire solar system, wherever there are human beings, erupted in cheers.

"Blood debt must be paid with blood! Blood debt must be paid with blood!"

"Make the Eta pay the price!"

"Expedition! Expedition!"

Han Liang's expression was still solemn: "Our human civilization has become stronger!

From today on, no one can ride on our heads!

Whoever dares to bully us again will make them pay with blood!

Soldiers, I command, set off! Use our battleships and guns to repay this blood debt owed to us by the Eta people! "

set off!

set off!

At this moment, deafening cheers sounded again. Among the space carriers and battleships, a total of 50 human warriors participating in this expedition also cheered at this moment.

Yes. Han Yang claimed to have recruited 5000 million soldiers, but the actual number was actually only 50.

Han Yang was not worried that anything strange would be noticed. The reason is very simple. Ordinary people simply do not have enough intelligence acquisition capabilities, and it is impossible to confirm whether the number of soldiers is 5000 million or 50.

At the same time, with most of the top military officials being dummies controlled by Han Yang, it was almost impossible for human generals to detect abnormalities.

Human generals or officials who have reached a certain level, because their level is high enough and their view of the problem is comprehensive enough, although they can vaguely detect some abnormalities, they will be told that this involves one of the core secrets of human civilization. They are not classified enough to know. , and no prying is allowed.

Under the premise that Han Yang has always done a good job in confidentiality education, these human officials or generals, even if they have doubts in their hearts, can only suppress it themselves and will not explore it at all.

Following Han Yang's order, at this moment, a total of hundreds of thousands of engines on the 10 space carriers located around the earth started at the same time.

The energy supplied by multiple nuclear fusion power plants turned into extremely high-speed plasma and was ejected from the rear of the engine, pushing the huge aerospace carrier with a single mass of hundreds of millions of tons to slowly accelerate. Breaking free from the earth's gravity.

At this moment, hundreds of thousands of stars seemed to appear in the earth's night sky at the same time, and the dark night sky seemed to become more colorful at this moment. The space carrier's engines are not aimed directly at the Earth. Because the energy of the tail flame is too high, if it is directly aimed at the earth, it will cause great damage to the earth, which is no less than a large solar flare.

At this moment, what people can see is just a little bit of the engine's residual light, which is already so bright. If the jet is aimed directly at the Earth, ten stars comparable to the full moon will appear in the Earth's night sky, directly lighting up the entire Earth's night sky.

This is the power of a huge interstellar spacecraft like a space carrier.

At the same time that the space carriers around the earth began to activate, a total of 40 space carriers located on other planet bases also began maneuvering.

A total of 50 space carriers will gather outside the orbit of Neptune, and then embark on an expedition to the Eta galaxy.

In the vast sky, one planet after another was passed by. Just over a month later, the space carrier fleet crossed the orbit of Neptune, and 50 space carriers gathered here to form a formation.

At this moment, the fleet's speed is about 3650 kilometers per second.

The speed is still accelerating further. At the same time, a total of about 5000 warships left their berths and dispersed around the space carrier to assume escort duties. There are also a large number of self-powered detection satellites, etc., which are scattered as far as 1000 million kilometers around the fleet to ensure that no enemy warship can get close to us.

Nowadays, there are thousands of warships on board an aerospace carrier. If we don't take precautions, if we are approached, a hydrogen bomb can wipe out an aerospace carrier and thousands of warships. Han Yang couldn't afford such a big loss.

Throughout the voyage, Han Yang will always ensure that the number of escort warships is no less than 5000. Of course, they will be rotated, and you can easily enter the berth to obtain supplies at any time.

Time passed slowly and the fleet continued to accelerate.

A year later, the fleet reached a speed of about 3.8 kilometers per second and traveled a total distance of about billion kilometers.

Even at such a distance, remote observation equipment within the solar system can clearly observe the fleet's tail flames.

There is no way, their power is too high and too bright.

In fact, until 3.2 years later, when the fleet speed had reached 40% of the speed of light and the total sailing distance had reached 6.1 trillion kilometers, Han Yang's sky survey and observation equipment could still capture traces of their tail flames.

According to Han Yang's estimation, he would not be able to capture traces of the tail flame through conventional sky survey equipment until the distance expanded to about 7 trillion kilometers. However, it can still be captured using special high-performance directional detection equipment.

At this moment, the acceleration finally stopped and the fleet entered the inertial navigation mode.

What awaits the expedition fleet will be 45 years of inertial navigation, covering a total distance of about 18 light years. After that, the fleet will start to slow down, and after it actually reaches the Eta galaxy, it will slow down to a low speed to facilitate the war.

Of course, the so-called 45 years here is actually only the time observed by people in the solar system.

Based on the relativistic effect, the faster an object moves, the slower the flow of time. However, a speed of 40% of the speed of light is enough to cause extremely obvious relativistic effects.

Through calculations, Han Yang confirmed that 45 years had passed in the solar system, but only about 41.25 years had passed in the expedition fleet.

Equivalent to every 11 months that have passed in the fleet, one year has passed for people in the solar system.

If Han Yang can achieve the economic speed of the expedition fleet to reach 80% of the speed of light like a third-level civilization, then the relativistic effect will be even more serious, reaching the point where every half year in the fleet will pass in the solar system. Time will pass twice as fast.

When the fleet speed reaches 0.99999999348 times the speed of light, it can even reach the effect that for every hour that passes in the fleet, one year of outside time passes.

Of course, Han Yang does not think that level three civilizations, or even level four civilizations, can reach this speed. Because at this speed, the relativistic mass will be extremely large.

For a substance with a mass of only one gram, at a speed so close to the speed of light, its relativistic mass will skyrocket by about 2.77 times to about 27.7 kilograms.

To push heavier materials, more fuel is needed. With more fuel, its own mass will be heavier. In this way, things have reached a point where even more fuel can no longer promote an increase in speed. As a result, even advanced civilizations, in Han Yang's view, are unlikely to be able to accelerate objects to such high speeds.

Of course, only for macroscopic objects. Because even Han Yang at this moment, in the particle accelerator, has already been able to accelerate particles to a speed far exceeding this speed.

It's not just relativistic effects. There are more wonderful things happening while sailing at such high speeds.

Such as red shift and blue shift.

Close to the object, a blue shift occurs. Far away from the object, redshift occurs. Just like a car's whistle takes on a different tone when approaching and moving away.

Light waves and sound waves also have similar properties.

At this moment, the bright stars in front of the fleet gradually showed blue light due to the high speed at this moment, and the background of the universe gradually changed from black to a faint blue, like an endless sea, which was breathtaking.

The stars behind the fleet showed a faint red color. But the background of the universe is still black and darker.

The magnificence and wonder of the universe were truly displayed in front of Han Yang at this moment. However, in such a magnificent universe, the expedition fleet spent more than 40 years. (End of chapter)