"Need us to do it?" Ruto was stunned for a moment and asked, "How do we do this?" ”

"Before I get into that, I'll tell you a story." Xiao Yu said, "You shouldn't know much about our human civilization. Well, when our human civilization was still at a very low stage, people generally believed that that the small planet was the whole of the universe, the core of the universe, and the sun, moon and stars, no matter what, revolved around the earth under their feet. And because the ground that people see is flat, people think that the earth is also flat. This is the saying that the sky is round and the place is round. ”

"There is nothing surprising that no matter how great a civilization is, it is in obscurity at the beginning of its birth." Ruto replied, "That's how our Pegasus civilization was in the beginning. ”

Xiao Yu didn't pay attention to Luto's statement, but still said to himself: "With the slow accumulation and development of science and technology in our human civilization, people have finally discovered the error of the saying that the sky is round and the place is round. The fact that the Earth is a sphere can better explain the phenomena that people observe. And there are also a growing number of observers confirming the fact that the Earth is a sphere. But unfortunately, up to that point, all speculation was just speculation, and there was no direct evidence to prove it. ”

"Until a navigator named Magellan verified it himself...... He led his fleet and bravely embarked on the journey when the abyss of the devil was at the end of the sky...... Above the boundless ocean, he encountered countless difficulties. There were strong winds, torrential rains, and great waves...... Sickness and exhaustion plagued the weak fleet. Death haunts like a devouring ghost...... You know, at the level of science at that time, it was unimaginable to make a trip around the world. But this pioneer, named Magellan, eventually succeeded. His fleet departed from one side of his country and returned from the other after circumnavigating the planet. He proved with his own actions the statement that the earth is a sphere. Since then, the brilliance of science has begun to dispel the clouds of ignorance, and our human civilization has since stepped into a new chapter. Xiao Yu said lightly. This thrilling story came out of Xiao Yu's mouth. It's like ordinary small talk. But behind this blandness, there is a shocking power of its own.

Ruto was silent, then said, "I want to break the ignorance." If a civilization wants to progress, it must need these pioneers to work hard. ”

"This is of epoch-making significance." Xiao Yu said, "In honor of this great pioneer, the two satellite galaxies of our home galaxy are named after this pioneer. This is the Large Magellanic Cloud and the Small Magellanic Cloud. ”

"That's a feat." Ruto sighed. "Okay. I see what you're trying to do. ”

Xiao Yu nodded: "That's right, I want to reproduce this scene now, I want to explore the origin of this universe we are in." Yes, by now, with our technology, we have a lot of evidence that the universe is a sphere in the fourth dimension, but ...... We don't always have the most direct evidence, right? I want to embark on another voyage that will take millions of years. Go on a circumnavigating the universe. It's too big for me to do it myself. I need you to cooperate with me. ”

"The observable radius of the universe is 13.7 billion light-years. Our fastest sailing speed at the moment can already reach 2,000 times the speed of light. This means that it will take at least 6.85 million years to reach the end of the universe from us. But one important thing is that the number of 13.7 billion light years is only observable, and beyond this number, we don't know what the universe looks like, what is there, and what kind of environment it is. All things considered, even if we go in different directions and converge at the end, we conservatively estimate that it will take more than 10 million years. Ruto muttered, "Well, it's been a great trip." ”

If the universe is really a sphere at the four-dimensional level, as Xiao Yu speculated, then there is no so-called center in the universe, or that any part of the universe is the center. Like a three-dimensional sphere, like a basketball, can you say where is the center of the surface of this basketball?

So, the starting point of the circumnavigation is where it doesn't matter, it's the same everywhere.

"Combined with the theories I said earlier." Xiao Yu said, "The speed of light is the upper limit of this universe, and our faster-than-light detection methods cannot detect such a distance. So, the age of the universe is 13.7 billion years, and the limit of our cognition is also a radius of 13.7 billion light-years. All information beyond this is unknown to us. And the unknown means superposition, and the situation there is uncertain for us. So...... I want to probe beyond the visible universe. A circumnavigation of the universe means a lot to us, and as long as we succeed, then we will see the origin of this universe. We will enter the eighth-level civilization category or higher level without the slightest hindrance, and we will truly become the pinnacle of this universe. ”

"If all goes well...... Ruto muttered to himself, a look of confusion in his eyes, as if he had fallen into a fantasy, "If it goes well, we will meet in about 10 million years, about 27 billion light-years away from here." But there are so many things that happen that we may lose touch forever and never find each other again. Well, it would be better to set the place where we want to gather is still here, in this flying kite galaxy, but in that case, we will need more than 20 million years and a range of more than 50 billion light-years. ”

"It doesn't matter where we want to get together." Xiao Yu said, "It doesn't matter if we lose touch forever. It is a thorny path to truth, and it is likely to be full of danger and death. I'm even ready to die on this path. I think...... The pioneer of our human civilization, the navigator named Magellan, must have felt the same way as me when he decided to go to sea. ”

"That's right, as long as you can find the origin of this universe and see the true face of this universe, the life of an individual, or the rise and fall of a civilization, it is really nothing." Ruto said, "Very well, you have managed to convince me, and I will fully support you." It's just that our civilization is not controlled by me, and you have to discuss with Ares how to implement this matter. ”

"No need to negotiate, I agree to this." Ares's image also appeared here at this time, "I'm absolutely sure that our people will agree with this." We're making history, we're creating the future, and I'm not a scientist, but I understand the significance of that. ”

"Good." Xiao Yu smiled and said, "On this thorny road, it is my honor to have you accompany me forward. Ares, Ruto, thank you. ”

"Don't thank us." Ares said, "We should thank you." Xiao Yu, thank you for giving us the qualifications to embark on this path. It's something I never dared to imagine before. ”

"We're comrades-in-arms, aren't we?" Xiao Yu said. Then they looked at each other and laughed at the same time.

"It's just...... We probably don't see the day when success comes. "Although our life science technology is advanced, although it claims that everyone can have eternal life, this is only a superficial statement. In reality, it is unlikely that we will live longer than a million years. This is the limit of the universe to the intelligent life of the group, and in the future, our children and grandchildren may meet you in our place. ”

"The inheritance of life is so wonderful." Xiao Yu said, "Your physical body will die, but your spirit will be passed on." To the extent that we are, between life and death, there seems to be nothing to fear. ”

Several people smiled again.

"We need to do some preparation. We had to deduce what might happen during the voyage and make as thorough preparations as possible. At the same time, we also need to work out some ways to find each other after the voyage...... Well, there's a lot to prepare, so let's set the start of the voyage to be a hundred years from now. ”

"Okay, in a hundred years."

Xiao Yu and the Shenzhou and Pegasus civilizations are undoubtedly powerful, but this kind of strength is still a little small in the face of the vastness of the universe. Xiao Yu has only been a few hundred thousand years old since his birth, but Xiao Yu now has to spend at least 10 million years to make this unprecedented great journey.

The vastness of the universe will be vividly displayed in front of Xiao Yu. No one knows what will happen to you along the way, what strange situations you will encounter. But Xiao Yu still decided to go.

"That's all I've been pursuing all my life." Xiao Yu muttered to himself, "Find Chen Mo and explore the unknown." Everything else is integrated into these two biggest goals. For me, even dying on the path of exploration is not a bad thing. ”

"Goodbye, my friends, and looking forward to our reunion in 10 million years...... Goodbye, goodbye. (To be continued......)