[Interstellar time 20101111, Peng Xiaoming's first and last war]

An oncoming fleet of ghosts. Sure enough, the ghost is here.

In that four-dimensional space, countless "pyramids" suddenly appeared, flying out of it, flying back to the third dimension from the contact point between the two dimensional spaces, as if suddenly "changing" out of the void.

When an observer observes the four-dimensional space, he cannot observe the whole picture of the four-dimensional space, but only a projection of it in the three-dimensional space. If you compare the fourth dimension to a giant, standing on a three-dimensional piece of paper, all he sees is the part of the soles of its feet that are in contact with the paper. So something comes out of there, as if something came out of nothing. This is the effect that Peng Xiaoming sees.

"Here they are."

Soon after seeing the fleet of the ghost civilization leave, Peng Xiaoming immediately saw the collapse happening again: there was a dazzling white line that seemed to cut off the universe, and it was at the junction of the third and fourth dimensions. With the white light as the background, the ghost fleet is approaching.

"Didn't the interstellar torpedo destroy them?"

"Nope. I knew I should use two-way foil. They were still in the fourth dimension when they were launched, and a missile in three dimensions was like an ant to the fourth dimension. If they are indifferent, maybe they will be destroyed. But they can go directly into the torpedo and take out the explosives from the fourth dimension, which is a direction beyond the third dimension, just like taking a small ......flower on a branch," the projection sighed.

"But doesn't dismantling a torpedo trigger an explosion?" Peng Xiaoming asked.

"There is no need to disassemble, because the interstellar torpedoes are, after all, three-dimensional, and they can take out what is inside without opening the closed shell, just by an extra direction. It's like if you draw a circle on a piece of paper, you can go straight into the circle from above, but a bug that is in the same plane as the circle can't unless you break it. The projection replied.

"In the higher dimensions, there is the power of God." Peng Xiaoming sighed.

"Uh-huh. But they may not have fully mastered this 'power', otherwise they would have taken out your brain directly when they were in the fourth dimension. Projection thought and said.

"I have another question, how did they make four-dimensional?"

"The principle of their creation of four-dimensional space is like the inversion of two-way foil dimensionality reduction, which makes the space curl up in one dimension to the microcosm. And to create a four-dimensional space is to extend a microscopic dimension to a macroscopic ......"

"Danger! Dangerous! Dangerous! "The starship AI made such a sound.

A stream of plasma streaked through, enveloping the entire starship in an instant. The starship was encased in a ball of plasma fireball, and the light of destruction shone brightly.

After that, more plasma streams streaked by, and the plasma fireball burned even more vigorously.

The starship's cooling system is running at full power, but it's too late. The plasma stream quickly melted the ship's hull, and the starship burst a gap, edged with a vigorous red that was spreading at a rapid pace, like magma in hell. The oxygen in the cabin roared out of the starship's cabin through the mouth, causing the starship to lose pressure.

"There is a severe lack of oxygen in the cabin, and Peng may be in danger of life." The AI screamed, and the alarm sounded constantly.

Drip ......

AI used a robotic arm to get Peng Xiaoming a set of cosmic suits, and Peng Xiaoming put it on. Continue to float inside the starship like a headless fly.

The projection seemed to think of something, so he exchanged a few words with the AI with consciousness. Because this consciousness exchange gave the consciousness channel key, Peng Xiaoming couldn't receive this consciousness form, and his mind was blank.

Drip ......

At this moment, a ring-shaped object in the tail of the starship's cabin lit up, the ring object was about the height of the ship's cabin, and the light was the stripes on its body. Then the AI enters something on the base of the ring, and the ring door starts to turn, gradually increasing its speed, and the light on the stripes is getting brighter and brighter.

This is a space wormhole. What the AI just entered was an interstellar coordinate.

Finally, the AI says, "Dear Peng, we will send you back to the solar system." This is our war, which originally did not require your participation. At this time, the war is coming to an end, we are about to be destroyed, you should go back, thank you for your help. ”

Drip ......

One of the ship's siding had fallen off and had fallen into space, half of the hull had been melted, and only half of the hollow cylinder remained. Peng Xiaoming stood on top of the shattered half of the starship, and the sound of the two boards cracking could be heard through the spacesuit. The sound was particularly loud, and the sound traveled through the solid to his hood. Since the inside of the spacesuit is an enclosed space, it sounds particularly loud.

However, at the time of destruction, he was thinking about a problem.

Is it to return to the solar system and enjoy it with peace of mind? Or continue to play this cosmic adventure with the Keystone Starship and explore the mysteries of the universe?

Before this question was finished, the AI's robotic arm pushed Peng Xiaoming into the wormhole.

"Ahh

Suddenly, Peng Xiaoming appeared in a place. There are clouds all around, and I am wrapped in clouds, and the sunset is extremely close to me. "Hey, what kind of place is this?" He said.

Then, just as he was wondering, suddenly, he noticed that his body was slowly falling, falling......

No, it's a rapid fall!

"Ahh

As he fell, he was getting closer and closer to the red earth. At first, the city was just a face, a small plane; Going down, the plane of the city becomes a little more three-dimensional, with an initial outline. There are also many small dots flying in the scattered buildings, in the longitudinal and horizontal roads, although it is not clear what they are; Further down, the inner structure of the city begins to be revealed, and the general roads and bridges can be seen clearly, winding and undulating like dragons; Further down, he found that the houses at this time were all tree-shaped, and every house in a building was a branch and leaf on the branches. The elevator is right in the trunk and it runs fast.

"Ahh

Down, down, down.

He saw people on the road, people were holding their luggage, as if there was something very urgent to do, and every building was full of luggage, probably packing their things, and it felt like the whole city was about to move. In addition, there are many space elevators hanging in the sky, and the cars rise in unison with the nanomaterial guide rails. In the elevator station at the bottom of the space ladder, many people are waiting with their luggage......

What are these people doing?

When he thought that he was about to collide with the road, he cried out again in horror: "Ahhh

In the next second, a person raised the mechanical arm and emitted a powerful magnetic field, which gave Peng Xiaoming in a spacesuit a strong resistance, and after ten seconds, Peng Xiaoming fell to the ground unharmed.

After landing, he took off his spacesuit and said, "Thank you, thank you." ”

After saying that, he realized that this is the world a thousand years later. When it was still on the cornerstone starship, it was flying infinitely close to the speed of light, so the effect of relativism was very large. Due to the difference in the speed of time, a thousand years have passed with the outside as a frame of reference.

"This ...... Why are you wearing such clothes? Peng Xiaoming asked. The person in front of him, dressed in mechanized clothes, has a robotic arm, an communicator, etc., and many functions and tools. The clothes are quite similar to the "ancient" cosmic clothes (the "ancient" is also Peng Xiaoming's era. But this kind of clothing was considered casual wear in this era. If it is a work uniform, different occupations have different functions on the clothes.

I saw that the person raised his arm, turned on a screen above, and scanned Peng Xiaoming, a strange person, and then got this information: According to the analysis of this person's clothing, this person is a person from a thousand years ago, and he is a "cross-time person" to match the language library of the conversation with him.

I saw the man talking, and the communicator on his clothes translated it into the language of a thousand years ago. Then speak out.

"It turns out that you are a 'time crosser', it's not easy...... A thousand years! ”

"The Spanner?"

"It's a term for someone who spans time according to the relativistic effect or hibernation." The man said, "You know hibernation, right? It is something that is sealed unconsciously by the extracorporeal life circulation system, the cryogenic body preservation system, and so on. As for the relativistic effect, it is ......"

"I know both. But what I want to ask is, what are you doing here? Peng Xiaoming pointed to the people who were hurrying with their luggage.

"They're going to get to the space elevator, get to the planet's orbit, and then take the spaceship through the interstellar gate, which is the wormhole."

"Where is it?"

"There." The man said.

Peng Xiaoming looked up and saw a flickering light in the sky, brighter than all the stars, except for the sun.

"It's a beacon, which means the stargate is there." The man added.

"Let's go." The man grabbed Peng Xiaoming, turned on the thruster, and flew to the elevator station.

As he flew into the air, Peng saw other people who were also flying, and he finally understood what the "white dot" he saw when he fell, it was the same person who was flying.

"Why did they go through a wormhole, and what did that wormhole lead to?" Peng Xiaoming asked.

"You haven't walked through a wormhole." The man asked.

I walked by, just ten minutes ago. Peng Xiaoming thought, but did not express it in words.

"Let's go, get on the elevator first, and I'll tell you on the elevator."

Peng Xiaoming looked at this novel world while walking with the man, and his style was completely different from his own era. He found that there were no cars in this era, and everyone had propellers on their clothes, so what else did they need? And anyone can wear it, not a professional spacesuit or a special suit for professional engineering.

"Are you tired of wearing these clothes?"

"Not tired, not tired, about the same weight as the ancient clothes you live in." The man said.

Peng Xiaoming was surprised.

"Well, you can go to the 'Chrono Hub'. There you can learn how to survive in this society. The knowledge study case is updated once a year. I've been a time-shifter, and it's pretty easy to get used to. The man said.

Soon, the two came to the elevator station while talking, and then to the elevator.

"Dude, I forgot to give the money." Peng Xiaoming said.

"The camera at the door has scanned my identification unit, the size of a seed, on the clothes, inside the right arm." He said.

Peng Xiaoming subconsciously looked at his right arm, and what he saw was only the mechanical arm, the real arm was inside the mechanical arm, and the identification unit was inserted in an interface in the mechanical arm, and it could not be seen on the surface.

The man put on his information glasses and glanced at his right arm, where a window popped out.

Balance: 12880.

But Peng Xiaoming didn't see anything. He now knew that the man's own data was only displayed above the information eye. "If it's a soldier's information glasses, there's a thermal imager, a target screening system; If it's a doctor's glasses, there's also a real-time B-ultrasound image...... I'll wear it for you for a while. The man said.

"Your name?" Peng Xiaoming just thought of this question.

“T

avelle

.” The man said.

“OK.” Peng Xiaoming then put on information glasses, looked away, and could zoom in and out freely. looked at the man, and an information window appeared on the man's body again; Looking at others, the information window is gone, and it is still the same as before. It seems that this era is strictly confidential about personal privacy, and it is more humane than before.

"What are we going to do?"

"Go to low Earth orbit and cross the stargate to another star system."

"What? Isn't it good to be right here? Peng Xiaoming said. At this time, he thought: I finally came back to the solar system once, and I had to go somewhere else.

"You think I'm not homesick? I don't want to stay at home. ”T

avelle

"Still, it's nothing, all of humanity is going to live there anyway." ”

"Wait, Jiaxing?"

"It's a title for a planet inhabited by man."

"I'll give you a change of clothes. After the change, you will be suitable for this era. ”T

avelle

immediately took out a set of clothes from the suitcase and let Peng Xiaoming put them on.

"So, can you answer my question?" Peng Xiaoming asked.

"Yes." And then he said—

"It's been a thousand years for you, right? It's been a thousand years...... The sun has also changed. The Sun has now passed the main-sequence stage and is about to become a middle-aged star, and the hydrogen fuel inside the Sun is about to run out. The man said.

"At that time, the inner core of the entire star will be filled with helium, and helium will begin to fuse, and once the temperature reaches 100 million to 200 million K, the temperature will increase rapidly, which will further increase the rate of helium fusion and expand the reaction area. But it doesn't increase the pressure, so the core doesn't expand steadily. The thermal runaway reaction causes the star to release energy very quickly, even a million times more than a million times that of a normal star in just a few seconds. The man said again.

"For medium-mass stars, gravity collapse causes the core density of the star to be very high, so helium flashes can occur when the core is depleted of hydrogen. During contraction, the core temperature becomes warmer and higher until the outer shell expands outward, beginning the phase of a red giant. When the star continues to shrink due to gravity, it eventually becomes a degenerate substance. Degeneracy causes the temperature of the star to rise, and helium combustion begins to close to the end of the explosion. The results of the latter ...... You can imagine. The man added.

"At that time, the sun's radiant energy was enough to kill all life in the solar system." Peng Xiaoming said.

“Bi

go.” T

avelle

Say.

"I see." Peng Xiaoming said, "So, where are we going?" ”

"Kepler-452b, 650 light-years away from us."