Three hours passed in a blink of an eye, with tears, blessings, and concern; but in the end everything turned into a firm determination to fight... For nothing else, just to protect this warm and civilized land now!

In space, electric sparks flash, and the magnetic engine works violently. The powerful thrust allows the 150-kilometer-long spacecraft to be driven by complicated light pressure at all; the breakthrough in the research and development of magnetic engines makes the spacecraft more dynamic and flexible.

In just one month, the spacecraft had accelerated to 0.3 times the speed of light, and got rid of the Zhurong Galaxy, which was much weaker than the (solar system), and entered space; from then on, it disappeared from the telescope's field of view.

In the lonely space, four human spacecraft are accelerating continuously. The enemy cannot invade the door of the house and fight. In the battle in the universe, it will be too late to wait until the enemy reaches the door of the house! Human beings have experienced some battles and have deduced too many battle possibilities. The best way is to block the enemy from outside the country!

There are only soldiers in the spaceship! Everyone looks serious. Even as the spaceship advances, they are immersed in the virtual network and constantly increase their combat experience. Fighting in the universe is very strict in the test of individual abilities. The distance between hundreds of thousands, millions or even billions of kilometers is far beyond the second propagation distance of the speed of light. In this case, if you want to hit the other party, you can only rely on experience and judgment. The computer cannot provide accurate information.

At this time, when the technology is not much different, it is more about testing the combat quality and wisdom of soldiers!

Behind four huge spacecraft, more than 2,000 huge war flying saucers are followed. Compared with spacecraft, the advantage of arrogance is that there are no dead corners, and war weapons can be arranged in every place. In addition, the surface of the flying saucer is that it is surrounded by dense fighter jets.

The gray-haired Du He stood in the space command center, barely breaking through the Golden Pill stage at the last moment of his life to continue his life, which also allowed Du He to retain his old face. However, this cannot conceal the ability of an excellent military talent. Mo Wentian personally led the fleet, while Du He stayed in space, responsible for commanding combat and coordination.

"The commander. The spacecraft formation has left the galaxy. Now it has reached 0.6 times the speed of light."

"Yes." Du He responded, but the scientist next to him was calculating.

In fact, there is another reason to take the initiative, that is, to use relativity to block the enemy! Using relativity? It sounds ridiculous at first glance. It's just a small theory. Can this thing be used as a weapon?

However, in fact, that's it! The enemy is now 3 light-years away from humans. According to the speed of the enemy's spacecraft 0.8 times the speed of light, if we do nothing, the enemy will inevitably arrive at Zhurong Star in four years (including the slowdown time). But what if humans take the initiative to attack?

The enemy's spacecraft is 0.8 times the speed of light, and the human spacecraft is 0.6 times the speed of light - it will eventually accelerate to 0.7 times the speed of light. Then this is a problem. In any case, the speed of light in the universe is constant. Even if two objects are moving in the opposite direction, the absolute speed between them should be 1.5 times the speed of light?

Wrong! Impossible!

Assuming that the distance between two spacecraft teams is three light years, one side moves at 0.8 times the speed of light, and the other side moves at 0.7 times the speed of light. Under low speed physical conditions, it should be possible to meet in two years. However, in high speed physical conditions, the actual time for the two to meet is: 2.822 years!

A very strange phenomenon, but this is the fact! Assuming that the coordinates of Zhurong Star are "0", and now the coordinates of the enemy spacecraft are "150", then theoretically, four years later, the enemy spacecraft should reach the "0" point! However, now, because the human spacecraft sets off, the time and space between the two are distorted, 2.822 years later, the enemy spacecraft can only reach the "70" position. Then, next, even if the human fleet is killed as soon as possible and continues to move forward, it will still take 1.75 years to reach the target! (calculated headache. Hiss...) Originally, the distance of 3 light years was 0.8 times the speed of light, and the enemy would take 3.75 years; but now it takes (2.822+1.75=4.572) years, adding 0.822 years out of thin air!

This is one of the practical cases of scientific theory! In addition to resisting the enemy from the country, it also bought at least 0.8 years for mankind out of thin air! And 0.8 years is enough for mankind to cultivate a group of troops with initial combat capabilities!

The most important thing is that this change is impossible to detect by people and machines in the coordinate system! In other words, even though time has increased, the human army and enemies in a state of war cannot detect the change, because this is a change in the universe itself! At this time, only "bystanders are clear"! If the other party does not know this, it may be attacked by humans - but think that such a developed civilization, even if there is no top theory like relativity, it must have experienced star-level battles, and such phenomena will not be ignored. Strategically, humans will never ignore this civilization that actively attacks!

"Didi..." In Zhurongxing's space base, scientists are calculating. The complex space environment makes it extremely difficult for the starry sky cannon to aim. Especially now, the relative movement of human spacecraft and enemy spacecraft has increased countless changes in the already complex space. And this is not only the speed of the rail cannon, but it is also a relatively large-scale movement compared to the enemy spacecraft!

In addition, there are also the movement of the universe itself, etc., which are very complex calculations. Now, the super computer has been working for more than a month, and the calculation progress has just reached 90%!

You Tao is a person who travels a hundred miles a day, and the same is true in the field of science. When you enter 90%, the progress bar begins to slow down.

In space, the giant starry sky cannon is still accelerating slowly, even exceeding the gravitational field of the planet, and its speed has reached 30 kilometers per second. The battle in the starry sky is different from the ground. In order to adapt to the huge reaction force, it has to accelerate the giant starry sky cannon in advance. After waiting for the giant cannon to be fired, the huge reaction force will stop the giant cannon instantly. Moreover, such an early acceleration will also increase the energy utilization rate as much as possible. This small change can increase the energy by 1% to the projectile!

Don’t underestimate 1% of the energy. You must know that accelerating the projectile to 0.8 times the speed of light will consume enough energy to meet the power consumption of a large city with a population of tens of millions in tens of millions of people! One percent of the energy is the total amount of electricity in a month!

The tense war preparations began in every corner of human society. Not only the starry cannons of the Zhurong Galaxy are ready, but the starry cannons of every planet are like this. Although the starry cannons are bulky, they are the last and most solid line of defense for humans. The starry cannon. A weapon that exerts physical impact to the extreme! Under extreme circumstances, they can be fired once an hour.

With a length of tens of thousands of kilometers, the giant starry sky cannon is definitely the Great Wall of Technology!

The silent universe, silent battle and war, has already started at a distance between the two sides three light years, and in a time span of three years in advance. This is a war in the universe, a completely different way of war from the ground.

"Dou!" After two months of sleepless efforts, the computer finally calculated the trajectory of the enemy spacecraft! It was about 3 light years, about 28 trillion kilometers away. It was locked!

"Wait, don't launch it first!" Du He stopped the scientist who was about to press the start switch happily.

"Why?" the scientists were puzzled.

"This is a strategy." Du He, with the confidence of a soldier, must of course explain it to these scientists clearly. Intellectuals are sometimes very stubborn; it is with this spirit of "being stubborn and stubborn" that scientists can continuously complete scientific research and progress.

"This way." Du He saw that the scientists' expressions were about to change, and quickly explained, "We must calculate it well. It is best to let the spaceships on both sides approach the combat distance. Our shells can hit the enemy. It is too early, which will alert the enemy and may cause unknown changes. Space is too far away, so we only have one chance to attack!

After an attack, the enemy may change the state of movement regardless of whether the target is hit or not, which makes us lose the locking direction; it is not conducive to the already-departed army to lock the enemy."

"Oh..." The scientist touched his nose in disappointment, and then started to calculate again. Calculate the distance between the two spacecraft fleets entering a state of war. According to the plan, humans will open fire at a distance of one light-year and start fighting with rail cannons. And this has a problem again. After the rail cannon is fired, the speed is faster. If the enemy counterattacks, the speed must be very fast. And a powerful civilization is probably a light-speed weapon.

This will result in the invalidation of all the data calculated above and need to be calculated from scratch!

"Ba la bar..." Scientists are not lacking in patience. Although calculating time and space is very complicated, especially every moment and every position is changing, humans can still calculate the precise space-time location. Standing on the planet, you can already calculate a target of one meter in size three light years away.

However, such advanced technology requires a technical team of thousands of people! The starry sky cannon is currently the only weapon that cannot be completely controlled by soldiers. It is nothing more, the technical content is too high! It even requires professional technical team development and temporary calculations!

In other words, the giant starry sky cannon is not only a weapon, but also a peak product of technology and one of the powerful tools for scientists to explore time and space! This is a weapon, and it is also a peak test machine!

When the Zhurong Galaxy was completely in the state of special war, hundreds of spacecraft in the entire human world set off, and any galaxies within 20 light years from here began to send troops. It was too late for further away; but the farther away sent troops around the earth - the solar system is the core of mankind.

Whether the civilizations that came to invade are powerful and how powerful are they? There is no human being yet. However, be careful to sail the ten thousand-year-old ship, and this is a battle that concerns the life and death of human beings. If the enemy is not strong, it can be regarded as a super-large-scale military exercise; and what if the enemy is really powerful?
Chapter completed!