Three hours passed in a blink of an eye, with tears, blessings, and concerns; But in the end, all the qiē turned into a firm determination to fight. If nothing else, just to protect this warm and civilized land now!

In space, electric sparks flicker, and magnetic engines work violently. The powerful thrust allows the spacecraft with a length of 150 kilometers to be driven by complicated light pressure at all; The breakthrough in the research and development of magnetic engines has made the kinetic energy of spacecraft more abundant and more flexible.

In just one month, the spacecraft had accelerated to 0.3 times the speed of light, and got rid of the much weaker Zhurong Galaxy (solar system) and entered space, disappearing from the telescope's field of view.

In the lonely space of space, the four human spaceships are constantly accelerating. Don't let the enemy break into your home while fighting. Battles in the universe, by the time the enemy hits the doorstep, it's too late! Humanity has been through a few battles, and there are too many possible battles. The best way to do this is to keep your enemies out of the country!

In the spaceship, there are only soldiers! Everyone looked stern, and even as the spaceship was advancing, they were immersed in the virtual network, constantly increasing their combat experience. The battle in the universe is very strict for the test of personal ability. The distance of hundreds of thousands, millions, or even hundreds of millions of kilometers far exceeds the second propagation distance of the speed of light, and in such a situation, if you want to hit the opponent, you can only rely on experience and judgment. Computers also cannot provide accurate information.

At this time, in the case of little difference in technology, it is more of a test of the soldier's fighting spirit and wisdom!

Behind four huge spaceships, more than 2,000 huge war saucers followed. Flying saucer compared to a flying ship. The advantage of arrogance is that there are no dead ends, and weapons of war can be arranged everywhere. Also, the surface of the flying saucer, attached to the densely packed fighter jet.

The white-haired Du He stood in the space command center, barely breaking through the Jindan period to extend his life at the last moment of his life, and Du He could only retain his old appearance. However, this cannot hide the ability of a good military talent. Mo Wentian personally led the fleet to set off, while Du He remained in space, responsible for directing the battle and coordination.

"Commander. The ship formation has left the system. Today, the speed has reached 0.6 times the speed of light. ”

"Hmm." Du He answered, but the scientist next to him was calculating.

In fact, there is another reason to take the initiative, and that is to use the theory of relativity to block the enemy! Using the theory of relativity? At first glance it sounds ridiculous. It's just a small theory. This thing can also be used as a weapon?

And yet in fact. That's it! The enemy is now 3 light-years away from humanity, calculated at 0.8 times the speed of light for the enemy's spaceship, if we do nothing. Then the enemy will inevitably arrive at Zhurongxing in four years (counting the deceleration time). But what if humans take the initiative?

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

Wrong! No way!

Assuming that the distance between the two spacecraft teams is three light-years, then one side is moving at 0.8 times the speed of light and the other is moving at 0.7 times the speed of light. However, in the high-speed physical state, the actual time of the two encounters is: 2.822 years!

It's a strange phenomenon, but it's just the way it is! Suppose the coordinates of Zhurongxing are "0", and now the coordinates of the enemy's spaceship are "150", then theoretically, after 4 years, the enemy's spaceship should reach the "0" point! Now, however, due to the departure of the human spaceship, the space-time between the two is distorted, and after 2.822, the enemy's spaceship can only reach the position of "70". Then, even if the human fleet is wiped out as soon as possible and continue to move forward, it will still take 1.75 years to reach the goal! (Calculate the headache.) Hiss...... At a distance of 3 light years and 0.8 times the speed of light, it would take 3.75 years for the enemy, but now it takes (2.822 + 1.75 = 4.572) years, adding 0.822 years of love out of thin air!

This is one of the practical examples of scientific theories! Taking the initiative to attack, in addition to defending the enemy at the gates of 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 armies that are beginning to have combat capabilities!

And most importantly, this kind of change, in the coordinate system, people and machines, etc., is imperceptible! In other words, it is clear that time has increased, but the human army and the enemy in a state of war cannot perceive the change, because this is the change of the universe itself! At this time, there is only "bystander clear"! If the other party doesn't know this, it may be overshadowed by human beings - but think about it, such a developed civilization, even if it does not have such a top theory as the theory of relativity, must have experienced star battles, and such a phenomenon will not be ignored. Strategically, mankind has never ignored this civilization that has taken the initiative to attack!

In the space base of "Didi Di ......" Zhu Rongxing, 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 spaceships and enemy spaceships has added countless changes to the already complex space. And that's not all, the speed of the rail gun can also have a huge initial velocity, which is a huge relative movement relative to the enemy's spaceship!

In addition to this, there is the motion of the universe itself, etc., which are very complex calculations. Now, the supercomputer has been working for more than a month, and the calculation progress is just entering 90%!

There is a way that is half ninety for those who travel a hundred miles, and the same is true in the field of science, when it enters 90%, the progress bar begins to slow down.

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

Don't underestimate 1% of the energy, you must know that accelerating the projectile to 0.8 times the speed of light consumes enough energy to meet the electricity consumption of a large city with a population of 10 million for ten years! One percent of energy is the total amount of electricity in a month!

Intense preparations for war begin in every corner of human society. It's not just the starry sky cannon of the Zhurong galaxy that is ready, but the starry sky cannon of every planet is the same. Starry sky cannon, albeit bulky. However, it is the last and strongest line of defense of mankind. Starry Sky Cannon. A weapon that takes physical impact to the extreme! At its limit, it can be launched once an hour.

With a length of tens of thousands of kilometers, the starry sky cannon is definitely the Great Wall of science and technology!

Silent universe, silent battle. War. At a distance of three light years between the two sides, in a time span of three years in advance. It's already started. This is a war of the universe. A very different approach to warfare than on the ground.

"Toot!" Zhu Rongxing's starry sky base, after two months of sleepless desperate calculations, the computer finally calculated the trajectory of the enemy's spaceship! It is about 3 light-years away and about 28 trillion kilometers. It's locked!

"Wait, don't launch yet!" Duhe stops the scientist who is about to press the start switch.

"Why?" Scientists are puzzled.

"It's strategy." With the self-confidence of a soldier, of course, he must explain to these scientists that intellectuals are sometimes very tough; It is precisely by relying on this spirit of "drilling the horns and being strong" that scientists can continue to complete scientific research and progress.

"That's it." Seeing that the scientists' faces were about to change, Duhe hurriedly explained, "We have to calculate, it is best to let the two spaceships get close to the combat distance, and our shells can hit the enemy." Too soon, it will alert the enemy, and perhaps unknown changes will occur. Space is too far away, and we only have one chance to attack!

After an attack, whether the target is hit or not, the enemy may change its state of motion, which makes us lose the direction of locking; It is also not conducive to the army that has already set off to lock on to the enemy. ”

"Oh......" The scientist rubbed his nose and started the calculations again. Calculate the distance at which two fleets of ships enter a state of war. According to the plan, humanity will be at a distance of one light year, open fire, and start the battle with railcannons. And this is a problem again, after the rail cannon is fired, the speed is faster, and if the enemy counterattacks, the speed must be very fast, and the powerful civilization is estimated to be a light-speed weapon.

Then this leads to zhì The numbers calculated earlier are all invalid and need to be calculated from the beginning!

Scientists are not short ......of patience, although the calculation of space-time is very complicated, especially every moment, every position is changing, but humans can still calculate the exact location of space-time. Standing on the planet, it is already possible to calculate a target three light-years away, one meter in size.

However, such advanced technology requires a technical team of thousands of people! The Starry Sky Cannon is currently the only weapon that cannot be fully controlled by soldiers. Without him, the technical content is too high! It even requires a professional technical team to develop and temporarily calculate!

In other words, the starry sky cannon is not only a weapon, but also a pinnacle product of science and technology and one of the weapons for scientists to explore time and space! This is not only a weapon, but also the pinnacle of testing machines!

When the Zhurong Galaxy completely entered the state of super-war, the entire human world, hundreds of spaceships set off, and as long as the galaxy was within 20 light-years from here, they all began to send troops. farther away, it's too late; But further afield, they sent troops around the Earth - the solar system is the core of humanity.

Whether and how powerful the civilization that came to invade is still not counted by mankind. However, be careful to sail the ship of 10,000 years, and this is an existential battle related to the life and death of mankind. If the enemy is not strong, it will be regarded as a super-large-scale military exercise; And what if the enemy is really strong?

The lonely space is ignited by the enthusiasm of mankind! Human spaceships, from various galaxies, large and small, carry the same enthusiasm! - Destroy the enemy! (To be continued......)