Inside the Vanguard spacecraft, Dada was still in place, but there was an extra chair next to him, and in this chair sat another Dhaka.

This Dhaka man is none other than Dada's crew and the physicist Saipu on the Explorer spacecraft, who came to a strange spaceship and faced the members of the alien civilization, although Saipu forced his composure, but his slightly clenched hands still showed his inner nervousness.

"Don't be nervous, we have no ill will." Su Yichen said, and at the same time gave Sai Pu a smile, compared to Ike, Su Yichen is more suitable to communicate with Sai Pu, after all, they are both scientists, and they are both scientists who study physics.

Su Yichen's words made Sai Pu relax slightly, and his clenched hand also loosened, of course, he also knew that these aliens did not have any ill will towards them, or it would be easy to destroy them with the level of the other party's technology. But it's one thing to know, it's another thing to face reality, Saipu's reaction is purely a normal reaction as a human being, and besides, he is a scientist, and scientists are often not good at communication, unless they face each other who have a common language, there is the possibility of in-depth communication.

For this, Su Yichen is very clear, as Su Yichen, who has presided over large-scale research and project work, is no stranger to this aspect, and immediately he first asked about the degree of physics research of the Dhaka civilization, and as the topic unfolded, Su Yichen chose a topic that the other party was more interested in chatting.

As expected, as the topic opened up, when it came to his professional knowledge, Sai Pu's demeanor became obviously relaxed, and the more he chatted, the more he speculated with Su Yichen, because he found that the other party's knowledge in physics was really incomparable to his own, of course, in terms of theory, the understanding of the Dhaka civilization and the earth civilization in some places is slightly different, and in essence, it is the same way. But because of these small differences, the two couldn't help but debate, and as soon as they debated, Sai Park completely forgot his identity and that of the other party, showing the unique character of a scientist.

As the debate unfolded, as it deepened, the voices of both sides sounded several degrees. At this point, Dada was a little uneasy and tried to warn Sai Pu, telling him that he was not dealing with a member of his own civilization, let alone a student or colleague at school. But before he could try to remind him, he was quietly stopped by Luo Yan, who shook her head at him with a smile, signaling that there was no need, because this kind of seemingly fierce but actually harmonious debate was exactly what they wanted.

"That's right! I didn't think of it, if this approach was taken. The energy conversion of controlled nuclear fusion will be much higher, and in the case of our spacecraft, if the new engine is replaced, its acceleration can be increased by almost 30%. ”

When Su Yichen took a moment to dissect some small questions about the theory of controlled nuclear fusion in the Dhaka civilization for Sai Pu, and after confirming that the other party was correct, Sai Pu was almost dancing excitedly, and he couldn't help but say a word. His eyes were filled with gratitude.

"It is not easy for the Dhaka civilization to get to where it is today, and this is just a technical gap. Even if I don't remind you, I think you Dhaka people can solve this problem after a period of exploration. Su Yichen knew that Sai Pu was grateful to him in his heart, and he immediately explained with a smile.

"Of course, we scientists in Dhaka will do this, but thank you, thank you for the reminder. This can save us a lot of detours. Saipu shook his head and said very seriously, for a conceited scientist, his gratitude was already very high.

Su Yichen himself is a scientist, and he is also from the late stage of the primitive civilization of the earth civilization to watch his civilization step by step to the level of the later second-level cosmic civilization. Members of every civilization. No matter for other higher cosmic civilizations, there is one thing that is the same, that is, belonging to and love for one's own civilization.

This is also the driving force for the Earth civilization to not give in under the attack of the Gaia civilization, strive to move forward, and finally win the war. Although the Dhaka civilization has not yet entered the period of cosmic civilization, judging from the degree of their civilization, it is only a matter of time to become a member of the cosmic civilization. This, or Sai Pu also thinks so in his heart, for the members of a higher-level alien civilization, Sai Pu can have an attitude of envy and seeking advice, but his feelings for his own civilization cannot be erased.

"Theoretically it can be done, in addition, I found that the metallurgical technology of your Dhaka civilization is very high, which is also a key to improving technology, as long as you make up for a short board of theoretical defects, I believe that the increase in the speed of the Explorer spacecraft is a matter of course." Su Yichen followed the other party's words and said, when he said this, he suddenly changed his words, and asked with some curiosity: "By the way, Captain Dada told us that the planet Dhaka is about 60 light years away from our current position, but it only took you a short period of 16 years and 97 days from the time you set off, according to the speed of your spacecraft, even if you continue to accelerate, it is impossible to exceed the speed of light, how did you do it?" ”

In fact, they invited Sai Pu over, and the key to asking was this question, the distance from the planet of Dhaka to here, and the degree of the other party's technology, all of which greatly restricted the speed and time of the other party's sailing. According to the normal situation, this kind of leap is impossible at all, unless they pass through a naturally formed wormhole like Su Yichen back then, only in this way will there be a spatial transition phenomenon, so as to reach the current distance.

But the problem is that Dada clearly told them that they had never encountered this situation when they were sailing, and the possibility of wormholes was ruled out, so what else could be causing this? Dada said that they have a special means, and it is this special means that allows the Explorer spacecraft to cross such a long distance without impossibility. As for what exactly this means is, Dada can't explain specifically, but Saipu, who is now sitting in front of them, is a key figure.

Hearing this inquiry, Saipu's face showed a sudden expression, and he glanced at Dada at the same time, it seemed that his captain had told the other party, otherwise the other party would not have specially invited him over.

"If there's anything you can't tell you about it, please forgive me for being reckless, just let my problem not exist." Su Yichen was afraid that the other party would think too much, after all, how important a technology that was not known to outsiders was to a civilization, Su Yichen knew this very well, and he was worried that Sai Pu had any concerns. In fact, they are more just curious about this matter.

"It's okay, it's nothing, and it's not a technology." Unexpectedly, Sai Pu shook his head and laughed at this time, he stretched out his finger and pointed at himself and said, "Did Captain Dada tell you that the key lies with me?" Actually, the captain was right. Judging by our technology and the engine performance of the Explorer spacecraft, 16 years and 97 days will not be able to fly a distance of 60 light-years in any way. You are also a scientist, you know much more about physics than I do, the fastest speed in the universe is the speed of light, from the point of view of physics, it is impossible to exceed the speed of light, according to the calculation of acceleration, the spacecraft can continue to accelerate in the universe, but no matter how long this acceleration lasts. The top speed can only be infinitely close to the speed of light, but it is absolutely impossible to reach and exceed the speed of light. ”

Su Yichen nodded silently, what Saipu said is the foundation of physics, and this kind of foundation is very clear to ordinary college students, not to mention them professionals. Speed is a major factor restricting space navigation, and it is also a fact that direct speed cannot exceed and reach the speed of light, whether it is the civilization of the earth or the civilization of the Rand, there has never been a spacecraft that has reached this speed. Even experimental simulations in the lab cannot exist.

So, what does Ike rely on for interstellar travel? How did they come from the Milky Way to the Andromeda Galaxy? These don't rely on speed. It's technology. Curvature technology and transition technology actually change not the speed, but the position of space, when the spacecraft performs these two flight modes, its absolute speed does not actually change, only the space around the spacecraft changes.

Saipu continued, "Our Dhaka civilization is still weak compared to your civilization. It is impossible to travel long distances with the current means, in fact, before the departure of the Explorer spacecraft, our goal was only to explore the area around our own galaxy, and at best the distance would not exceed 2 light years. To put it mildly, even if it's a 2 light-year distance. With the acceleration of our spacecraft, I'm afraid it will take a long time. ”

"So, how did you get to this place?" Hearing this, Luo Yan couldn't help but ask, not only her, but everyone had great doubts in their eyes.

"The captain is right, in fact, it all has to do with me, and this is a ......long story." Sai Pa began to tell the story of how they arrived 60 light-years away from Dhaka, and according to the original plan of the Explorer spacecraft, they were simply exploring the surrounding area of their galaxy in order to prepare the future Dhaka people to actually go out of space and enter the cosmic age.

At first, everything was exactly what happened, the Explorer spacecraft took two full years to fly to the edge of the small galaxy, not to mention 2 light years, not even 0.1 light years, but in the process of continuing to explore the universe, Sai Pu found that his feelings had some changes, when did this change start, and what the change meant, Sai Pu did not know, he was just a feeling, a feeling of not adapting to his body.

At first, Saipu thought that he was sick or not, and he could be checked by the instrument to see that he was in good health, which made Saipu very confused. That strange feeling can't be seen or touched, and it's not always there, sometimes Saipu even thinks that he has a mental problem, otherwise how could there be such a feeling?

Fortunately, when this feeling appeared intermittently, Saipu had no other problems except for feeling confused and inconvenient, and after a long time, the human body naturally got used to it, and he finally guessed that maybe he had experienced a long-term space voyage, because the body had some uncomfortable feedback in the universe. After a period of rest, Saipu returned to normal, as if nothing had happened.

But he didn't know that this was just the beginning. Although there are six people in the Explorer spacecraft, these six people are usually divided into three groups and take turns, which is also an arrangement to better maintain the condition of everyone during the long voyage. One day, it happened to be the turn of Saipu and his team, and Saipu and a partner astronaut were tasked with piloting the spacecraft to a planetary area, and according to the plan, they would have to fly for several months to reach their destination.

When the spacecraft began to accelerate again and move towards the goal, the astronaut temporarily handed over the control authority to Saipu because he had data to calculate, and Saipu was fully responsible for the piloting of the spacecraft.

When looking at the target in the distance, feeling the seemingly fast speed of his spaceship but moving forward slowly, Saipu couldn't help but feel in his heart why the technology of his civilization could not be higher and make the space voyage faster. Just when he was so emotional, his eyes looking ahead suddenly changed, at first Sai Pu felt dazzled, he thought that his eyes were tired when he stared in one direction, but when he subconsciously rubbed his eyes, and when he looked again, the dazzled was not only not good, but also more and more "serious".

The universe as far as his eyes could be seen, and in Saipu's eyes, the whole universe was different from before, and there were red and dark red lines everywhere in the dark cosmic space, which were dense and faint. At this moment, Saipu was frightened, he thought that there was something wrong with his eyes, but when he turned his head to look into the cabin, everything was back to normal, and there were some lines there.

"What's going on?" Saipu once again set his eyes on the universe in front of him, and those lines appeared again without warning, thick and thin, bright and dark colors, flying in the cosmic space, emerging, and disappearing. What exactly are these things? Sai Pu really couldn't understand what he was seeing, and at this time, a dark red line suddenly appeared near the position where the spaceship was advancing, and for some reason, Sai Pu, who was controlling the spaceship, actually subconsciously adjusted the course and went in the direction of that line.

All these actions were done subconsciously, and Saipu didn't understand why he did it, and when he reacted, the line was already in front of him, and Saipu watched in horror as the spaceship cut directly into a part of the line and couldn't react at all. (To be continued.) )