Pioneer is now away from Pluto and is flying towards the direction of the earth at an extremely high speed in space.￥f

In recent years, after many modifications, the current Pioneer has been greatly different from the original Pioneer. The external volume of the entire spacecraft has increased by about 13%, the internal volume has increased by 9%, and the shape has also undergone some different changes. What is more important is that the core part of the spacecraft, that is, its controllable thermonuclear fusion engine, has been upgraded several times, and has reached the most advanced level of mastering technology.

In addition to the various materials of the spacecraft's shell, interior, and even controllable thermonuclear fusion devices, the Pioneer spacecraft can be said to be the highest speed of human beings. Its ordinary speed in space has even surpassed the Gaia's spacecraft technology. Of course, this premise is that when the Gaia's curvature technology is not used, the current calculation of the Pioneer's journey from the Pluto base to the earth has been shortened from nearly a year to only one month.

This speed is already extremely amazing. In fact, according to theory, if the Pioneer has a certain amount of acceleration of a certain amount of time, it can even reach the final flight speed of sub-light in the universe. Of course, this is just a theory. First of all, such a long acceleration time is impossible to achieve. Secondly, even if the Pioneer finally reaches the sub-light speed, or only reaches half of the sub-light speed, this is a disaster for the Pioneer and even the people on the Pioneer.

Because the reason is very simple, the universe is not a vacuum state without any object. The entire universe is filled with various celestial bodies of all sizes. These celestial bodies are almost all over the universe. Once the speed of artificial celestial bodies reaches a certain level, there is no time to avoid or turn in the direction of the progress. If this happens, there is only one result. That is, collisions occur at extremely high speeds, and the huge kinetic energy released by the collision is enough to destroy the Pioneer itself.

Therefore, the faster the speed, the more dangerous it is to sail exponentially. Although the Pioneer uses the intelligent brain as the central control system, relying on the rapid response of the intelligent brain to maintain safety during such a high speed. But from this point of view, the current critical safe maximum speed of the Pioneer is around this range. Once this speed exceeds this speed, even if the intelligent brain reacts, the spacecraft cannot adjust the route in such a short time.

Compared with the Pioneer flying at high speed, the squadron of the Earth Space Fleet, which is the fleet led by Ivan, is still far behind. According to the flight time of both sides, it is expected that the fleet will not reach the Earth's orbit one and a half months after the Pioneer arrives on Earth.

"What are you thinking?" Luo Yan had just finished monitoring and got up to the bridge. When she saw Su Yichen standing alone on one side of the bridge, she was a little curious when she looked at the space outside in a daze. Compared with the extremely high speed of the spacecraft, the stars in the space still seemed to have not moved their positions, as if they had been shining forever since ancient times.

He stretched out his right hand and naturally held Luo Yan's left hand approaching him. Su Yichen raised his left hand and pointed to Fanxing in front of him and said, "I'm wondering how big the entire universe is, how many cosmic civilizations are in our Milky Way. Even the low-level civilizations like our earth are there...."

"There must be many." Luo Yan's eyes followed his fingers and asked, "Why did he suddenly think of these?"

"I don't know, maybe it's because I'm a little sad."

"Sadness? Why?" Luo Yan's expression showed a little surprise. As the main fleet of Gaia civilization left voluntarily, the war on earth had ended in the world, and now the human nightmare has finally passed. The earth's civilization is about to usher in its post-war rebirth. Perhaps it will take less time for humans to truly transcend from primary civilization to the ranks of cosmic civilization. At this time, Su Yichen now thought about it was sad?

"Sad. Yes!" Su Yichen nodded with a solemn expression: "The single cell of basic life was born billions of years ago in this planet called the Earth. In the long years, the continuous evolution of life and some fate arrangements finally emerged. Human beings continued to develop on this planet from nothing, and at the same time explored the mysteries of themselves and nature. After tens of millions of years, they gradually came to modern times and achieved the glory of the times we live in. Someone once said that human beings are the spirits of all things, and human beings are the darlings of the Creator, but in my opinion, this sentence is actually wrong. Human beings can achieve today entirely through their own indomitable efforts and struggles. Every progress of human beings is a huge price, and these prices even include the lives and blood and tears of countless people..."

Luo Yan understood Su Yichen's idea at this time. Indeed, every progress of human beings is produced at the cost. Whether in ancient times, people were facing the cruelty of nature and the threat of beasts, human beings gradually learned to hunt, use tools, and learn to farm and grazing to meet their needs. In this process, countless human beings paid the price of their lives, but these costs were not sacrificed in vain. It was because of these costs that human beings grew up step by step.

In ancient times, the initial establishment of institutional states was accompanied by endless blood and life from the beginning. Historians once said that human history is actually a history of war. There is not much time to truly peace in the long river of history, and most of them are spent in one war after another.

Due to the reasons of war, people invented gunpowder and various killing weapons, and these inventions also promoted the development of human science and technology. These are also prominent in modern history. Starting from the 19th century, after Western countries experienced the era of great navigation, humans officially moved from their own place to the world, thus leading to the most magnificent scene in modern history. For a full hundred years, Western countries occupied an advanced position among the countries on earth due to the development of science and technology, and began to invade the backward East. The beginning of the Opium War unveiled the curtain of modern history, followed by World War I and World War II. These two wars in the early 20th century cost mankind a great price. Tens of millions of people died in war, countless cities were destroyed, national systems were destroyed, people lost their homes and were displaced. But similarly, when the war ended, human science and technology once again made a leap.

Now, the war between Gaia civilization and Earth civilization has come to an end, and peace has returned to the earth and between humans. But whether it is Su Yichen or Luo Yan, they all know very well that the destructiveness this war has brought to the earth and humans, which can be said to be unprecedented in human history.

According to the preliminary statistics, the number of human losses in this war has exceeded 40%. According to the total number of global population before the war is about 7.2 billion, 40% is close to 2.9 billion. This number is almost the sum of many wars in human history before. And the number is still increasing at present, because although the war with the Gaia civilization has ended, the chaos in most countries and regions on earth has not been improved. The bad nature of human beings, including the greed of some people, is driven by thousands of people in some places and hundreds of people die in conflict every day.

This is just the result of a war between Gaia civilization and Earth civilization. After the war, everyone knew that human technology would take off further, which marked that it was not long before Earth civilization truly entered the ranks of cosmic civilization.

But it is precisely because of this that Su Yichen feels sad in his heart. After the locals truly enter the cosmic civilization, humans will inevitably come into contact with more and more powerful cosmic civilizations, just like China in the 19th century. When the old empire was opened with Western naval cannons, they suddenly faced the entire world from one country to another. Now humans will also face the entire universe, at least the entire Milky Way. In this case, if one step is not careful, no one can predict what the earth civilization will end up with.

"The strong prey on the weak, and the world chooses the heavens to survive." In fact, this sentence is also possible in the entire universe. The Gaia civilization is just an ordinary cosmic civilization, not an advanced cosmic civilization. But just such an ordinary cosmic civilization almost brought a catastrophe to the earth's civilization. In the Milky Way, there are many cosmic civilizations that are stronger than the Gaia civilization. Not to mention these, even Ike's Rant civilization is so brilliant, and it is not the same that it disappears in the Milky Way now?

Su Yichen was a little confused at this moment, but he was very helpless because fate was like a pair of shapeless hands pushing humans forward. In this rugged truth, no one knows that humans can finally reach that step.

"Don't think too much. Maybe everything will not be as bad as you think. Besides, we humans are not that fragile. When we enter the universe civilization, it will be much better than the current situation." Luo Yan comforted her lover softly. She was worried that Su Yichen would change her psychology because of this war. She didn't want her lover to lose confidence in humans, and she didn't want to see Su Yichen suffer from these difficulties.

"It's okay, I just suddenly feel sad, don't worry." As if I knew what Luo Yan was thinking, Su Yichen shook her hand and turned around and smiled.

Seeing him laughing, Luo Yan felt relieved and finally let go of her heart.

"Have you made arrangements for going back this time?" Luo Yan asked.

"Well, I have to meet Professor Wan and Lao Hu first. I haven't seen them for so many years. I've been thinking about it in my heart." Su Yichen nodded and said, "I didn't expect that I would meet them again one day. I almost searched the base inside the base before leaving the Earth base, but I never found them. I have been wondering all these years, what happened to them, is it okay? Can I meet again? Haha, I didn't expect that there would be such a day. Looking back at the scene that year is the same as what happened yesterday, it's really touching!"

"Yes, I didn't expect to see Professor Wan again." Luo Yan was also extremely moved. When they left the Pluto base on Pioneer, they received a message from the earth shortly after they learned that Wan Changchun and Hu Zhijun actually appeared, Su Yichen was surprised and happy. He never thought that he would meet them again. If it weren't for the war, the communication could not be maintained for a long time. In addition to other reasons, Su Yichen even wanted to have a good chat with Wan Changchun, Hu Zhijun and others.

The same is true for Luo Yan. She was also happy to meet Wan Changchun again, but at the same time she also thought of her father Professor Luo Shaohua. Unfortunately, Professor Luo passed away early and there were several comrades who were together back then. It would be great if they were still there now.

Su Yichen has made arrangements. He is preparing to go directly to the Earth base after arriving on the Earth. On the one hand, he meets Wan Changchun, Hu Zhijun, Lin Dong, Tian Lao and others. On the other hand, he is to enter the Earth base as soon as possible and rely on the basic authority of the Earth base he has to make the Earth base serve mankind as much as possible.

The emergence of the Earth Base was a complete accident. Su Yichen, who was the candidate, also obtained the basic authority of the Earth Base because of this accident. However, according to the instructions of the base system, his authority has a deadline. The entire Earth Base will not stay on the ground for too long, and at most it will only last for a year. In other words, he must handle everything within this year. This is also an important reason why Su Yichen decided to return to Earth as soon as the Gaias took the initiative to leave the solar system.

Compared with Pluto's base, the Earth base is much larger and more complete, and the countless secrets and scientific information contained in it are also of great value. If some more cutting-edge technologies can be obtained from it, then when humans enter the ranks of cosmic civilizations, at least humans will have the ability to protect themselves in the face of other cosmic civilizations like the Gaia civilization.

"I heard that the Earth has already begun to discuss the establishment of a global alliance organization. Several commanders on the Earth Fleet also expressed their recognition that the new global alliance organization will completely replace the original countries on Earth. This is a big deal. Yichen, what do you think?" Luo Yan suddenly thought of something and couldn't help asking.

"From the overall situation, it is a good thing. Those who divide the world must unite." Su Yichen replied with a smile, then shook his head and said, "But I don't want to mix political things. We just need to do our things well, what do you think?"

"That's right! That's what I mean." Luo Yan Zhanyan smiled and nodded heavily. The two of them stood side by side with their hands and fingers standing side by side, continuing to look at the countless stars. (To be continued, please search for Astronomy, the novel is better and faster!
Chapter completed!