The Pioneer spacecraft returned to Earth with a medium-sized spaceship, about the size of the Pioneer spacecraft, but with technology that Earth's civilization could not match. According to the maximum flight speed of the Blue Star Civilization, it only takes 4 years to reach the Earth directly from the home star of the Blue Star Civilization, which is much shorter than the time it took for the Pioneer spacecraft to go to the Blue Star, and even if the stopover part is removed, it is far faster than the Pioneer spacecraft.

As a third-level civilization, the Blue Star civilization belongs to the highest level of the lower civilizations, and their curvature engine has been achieved to the extreme, in the process of curvature flight, not only the energy consumption is nearly half less than that of the earth civilization, but the energy output has increased by 30%, and its speed is not comparable to the earth civilization.

However, in order to take care of the flight speed of the Pioneer spacecraft, the medium-sized spaceship of the Blue Star Civilization maintained the same speed as the Pioneer spacecraft, but even so, due to the perfect star map and sailing, the return time of Su Yichen and his party was greatly shortened, and it was calculated that they would arrive in the solar system in about 5 years and 10 months.

The Blue Star Civilization has brought great gains to the Earth Civilization, which is not only a "reliable" quasi-ally of the Earth Civilization, but also the first step for the Earth Civilization to truly enter the cosmic civilization. In addition, on the way of the Pioneer spaceship to the Blue Star Civilization, Su Yichen and the others took out a small part of the items obtained from the wreckage of the commercial spaceship of the Nimunle Civilization that they encountered during the stay of the Blue Star Civilization, and after the Blue Star Civilization identified that these were the materials and some energy crystals that were commonly needed by the low-level and medium-level cosmic civilizations, and their value was not low.

According to the value of these things offered by the Blue Star people, these things installed on the Pioneer spacecraft are an extremely large fortune, if Su Yichen changes hands and sells all these things, then it can be said that Su Yichen will become a wealthy man in the Blue Star civilization in the blink of an eye.

However, Su Yichen never had the idea of selling them. Rather, it is through contact with the Blue Star civilization to understand and understand the characteristics and applications of these materials and energy crystals. For the earth civilization, the return of these things to the earth will be a more important wealth, and it also belongs to the entire earth civilization, not a single person.

In addition, Su Yichen was more concerned about the small object like a glass pyramid he found in the wreckage of the spaceship, for safety. Su Yichen didn't give this thing to the Blue Star people for identification, because in his heart, he felt that this thing was not simple, and it was definitely not an ordinary plaything.

The first is its texture, on the way to the Blue Star civilization, Su Yichen used the equipment on the Pioneer spacecraft to test it many times, but the test results were dismal. Because none of the tests had an accurate result, it was not even clear what material it was made of.

Second, the dreamlike starry sky image in the center of the small pyramid made Su Yichen even more puzzled, and he thought of the pyramid of the Rand civilization many times. Just like the star map of the Earth base and the Pluto base, but Su Yichen didn't have any confidence in this judgment, but just guessed.

Thirdly, the small pyramid was obtained from an important place in the wreckage of the ship, and as the captain of a medium-civilization commercial ship of the Nimonle civilization, he hid this item in his special compartment and stored it with safe-like equipment, which alone can tell the difference.

Su Yichen kept an eye on it. On the one hand, he used the opportunity to communicate with the Blue Star civilization to ask about the origin of such items, and on the other hand, he went with Su Li to find and confirm what it was. But whether it is Su Yichen himself or Su Li. Their final result was still nothing, and even the database of a third-level civilization of the Blue Star Civilization did not find any information about such a thing.

At this point, Su Yichen, who was helpless, could only continue to put it away and wait to find a way to study it after returning to Earth. On the way back, in addition to continuing to communicate with the fellow Blue Star people, he also absorbed and learned some of the techniques of the Blue Star civilization through this valuable journey. In particular, their knowledge and use of space and space have greatly benefited the crew of the Pioneer spacecraft.

Tang Le was a member of the Blue Star Civilization Mission, but because of his special identity and Su Yichen's prior promise, Tang Le did not go to the medium-sized spaceship of the Blue Star Civilization. Instead, he came to the Pioneer spacecraft.

Inside the Pioneer spaceship, Tang Le's favorite person to deal with is not Su Yichen, let alone Luo Yan, nor Gao Jian and Kevin. Adams, but as an intelligent being, Su Li. I don't know where Tang Le's spirit came from, since he returned to the Pioneer, he has followed Su Li almost every day to ask questions, and the questions he asks are very fast, one moment he is still asking about the scenery of the earth, and the next moment he is asking about the view of intelligent life on the universe. Initially, after Su Yichen's explanation, Su Li still patiently answered one or two, but after a long time, even if Su Li is an intelligent life, she was a little bored, and she looked like she ignored Tang Le, but Tang Li still pestered Su Li like kraft candy, so angry that Su Li couldn't beat or scold.

"Dad, this Tang Le is so annoying, you can't drive him to the Blue Star Man's spaceship?" Su Li, who was helpless, could only run to Su Yichen to complain, pouting and looking angry.

Su Yichen couldn't laugh or cry about this, Tang Le's identity was special, his stay in the Pioneer spaceship was decided in advance, how could he be driven out? What's more, the importance of the Blue Star Civilization is self-evident for the Earth Civilization, as the youngest son of the three archons of the Blue Star Civilization, Tang Le has given them a lot of help, and in the subsequent exchanges, Tang Le's role is also very great, so Su Yichen can only patiently explain these things to Su Li and let her try to cooperate.

"It's not that I'm not cooperative, he's so annoying, like a child." Su Li said with the appearance of a little adult, her expression made people want to be happy. But what Su Li said was right, Tang Le was indeed a bit too much pestering Su Li these days, and she could have been tougher when Su Li didn't know his identity before, but now with Su Yichen's explanation, she didn't know how to deal with it, the way back was still very far, and she couldn't keep it like this. What's more, Su Li has an important job in the Pioneer spaceship, and in a sense, Su Li is the real brain of this spaceship.

"So what do you say?" Su Yichen asked.

Su Li tilted her head and pondered for a while and made a suggestion: "Agree with him in three chapters, and stipulate the number and time of questions." Either my head is going to explode. ”

"Hehe, okay, it's decided!" This was a good idea, and Su Yichen immediately invited Tang Le and told him that since Su Li herself had a lot of work to deal with, he hoped that Tang Le, as a temporary crew member, could cooperate with Su Li. After some haggling. The two sides reached an agreement, that is, Tang Le asked Su Li a maximum of three questions every day, and once the three questions were asked, he could not continue to ask, and this question could not be accumulated, and it did not need to be invalidated on the same day.

Since having this rule, Su Li has gotten rid of Tang Le's constant entanglement, but even so, the questions asked by Tang Le have become more and more tricky, and even once asked Su Li if intelligent life can fall in love, and whether a little girl like her is really a woman. Will you find a male intelligent life to marry in the future? Su Li's eyes were so angry with this question that she almost pulled out a knife and cut out his tongue directly.

The journey back was very smooth, except for the necessary stops along the way, their group basically spent the course of the voyage. Half a year has passed in a blink of an eye, and this half year of boring travel is more boring than when it came, but Tang Le and Su Li's daily noise has added a sense of interest to the interior of the Pioneer spacecraft, and after a long time, Su Li has no choice but to accept this fact. What's more, Downle also kept his promises, and since the agreement was reached, there has never been a time when more than three questions were raised in a day. This made Su Li very satisfied.

On this day, Su Yichen was on duty on the bridge, Gao Jian and Kevin. Adams rested in their cabins, while Tang Le also went to sleep in the cabins on time, Su Li was in the central control room to sort out data with the spaceship brain, and only Su Yichen and his wife were on the bridge.

"Have a cup of coffee." Luo Yan looked at the time. I got up and made a cup of coffee and put it in my husband's hand, who was writing the captain's diary.

"Thanks, I'll finish writing with a few more." Su Yichen said with a smile, and then continued to write his captain's diary, which was an important information for their voyage. It will also be a valuable asset belonging to the first expedition of the Earth civilization to the galaxy.

A few minutes later, Su Yichen wrote the last sentence on the computer, then closed the storage, and then took a sip of the still steaming coffee.

"Your craft is getting better and better, this coffee is so fragrant."

"If you like it." Luo Yan smiled happily.

"By the way, has the routine message been sent?" After taking another sip of coffee, Su Yichen remembered something and asked.

"Of course, the last time I sailed out of curvature, it was sent on time." Luo Yan replied, and then said a little puzzled: "Actually, I don't think it's necessary, according to the time of the information return, even if it is transmitted back to the solar system at the speed of light, it is not as fast as our return journey, which means that when we return to Earth, this information is still on the way, and it may be a few years before we receive it." ”

"I know, of course I do." Su Yichen smiled and nodded: "But have you thought about it, anything will happen in the universe, once we encounter unpredictable dangers in the middle, then the importance of this information is self-evident." Therefore, the main purpose of this information is not to contact the earth as soon as possible, but to prepare for the unexpected. ”

"Or a last word?" Luo Yan said, then shook her head with a sigh. Her eyes couldn't help but look out, on the side of the bridge, the holograms outside were clearly displayed in front of them, the starry sky and the universe were distorted due to the curvature of the navigation, and even the light became strange ribbons. But at this time, Luo Yan did not see these scenes, but looked at the still distant solar system through them, and after so many days, she was a little homesick.

Yes, homesick. No matter where they are, as earthlings, there is only one home, and this home is their beautiful earth. Only on the earth, feeling the embrace of Mother Earth, can the earth have a real feeling of home.

This situation may be difficult for ordinary earthlings to understand, but after nearly 20 years of long space journey, the longing for the earth is becoming more and more intense in their hearts. In fact, not only Luo Yan, but even Su Yichen is the same, how much he even wants to breathe a breath of air with a faint industrial atmosphere on the earth! Although the air was far less pure than the air they breathed now, he always felt that only that air tasted of home.

"Soon, we will be home soon, when the time comes, I promise you to stay on Earth with you, let's go back to Shimen, do you remember Shimen's home? We just lived there and never left, and then happily lived the life of our hope and had a lovely ...... child. Gently hugging Luo Yan's shoulder, Su Yichen said in her ear.

When she heard the previous words, Luo Yan's eyes lit up significantly, and the last sentence made her face slightly red.

"Still having children? I'm an old woman, it's not sure if I give birth or not, and besides, this can't be a joke? ”

"Who dares to laugh at you? You say you're an old woman? Am I not an old man then? What are you afraid of! Besides, it seems to me that you are younger than any little girl. Su Yichen said this in her ear, Luo Yan was so ashamed that her ears turned red, looking at his still young and beautiful wife, Su Yichen's heart couldn't help but ripple slightly.

Decades have passed in a flash, and Luo Yan's age is now nearly eighty years old, but she still looks as beautiful as twenty-eight years old. This is not only because Luo Yan used life-sustaining equipment at the Pluto base, but more importantly, they spent their trip in curvature navigation, and in curvature navigation, the light is distorted, which also causes the distortion of time. According to the theory of relativity, time will stagnate and regress when the speed exceeds light, but curvature navigation is not really flying at the speed of light, in fact, in the universe, no cosmic civilization can reach and exceed the speed of light in a conventional flight attitude. However, the development of science and technology has enabled cosmic civilizations to have curvature technology and even more advanced transition technology, and these technologies break through the speed of light in another way, which will also cause changes in the time dimension.

This is actually not only Luo Yan, but everyone on the Pioneer spacecraft, including Kevin, who seems to be the oldest. Adams is the same, nearly 20 years have passed, this old guy not only does not get older, on the contrary, he is getting better and better, that is, the surprise that the wonderful universe brings to life. (To be continued......)