Li Yang's plan is proceeding in an orderly manner, and the preliminary demonstration of the space elevator project has also ended, and the result of the demonstration is that the space elevator project is very feasible and worthy of global resource investment.

Accompanying Li Yang is Wang Miao, the head of the project team, and this position is Li Yang's strong request that the PDC must be held by Wang Miao, because Wang Miao and Li Yang have cooperated, and Wang Miao is trustworthy for Li Yang.

"In my vision, the space elevator as a whole should be a structure under tension or compression. Compared to the high-rise buildings on the Blue Star, the space elevator has a large slenderness ratio. At present, the slenderness ratio of the tallest building in Blue Star is 10:1, and the slenderness ratio of the space elevator can even reach the order of 10,000, so the materials and site selection of the space elevator are a key point, so I propose that you be the person in charge of this project......" Li Yang walked while talking to Wang Miao beside him.

"Thank you very much for letting me lead this project, to be honest, in the era of crisis, my research can still do something for humanity, I am very happy, rest assured that I will complete this project seriously." Wang Miao said and took Li Yang to the simulation laboratory.

"You see, this is a simulation of the space elevator that we designed, and its main structure consists of: a ground station at the equator, cables, synchronous orbital stations, counterweights, and cars. As the starting end of the cable, the ground station should play the role of fixing the entire elevator.

The cable provides a lifting track for the car, and at the same time provides a channel for the counterweight to provide tension, which is the benchmark of the overall structure. The location of the synchronous orbital station in the synchronous orbit allows the entire structure to be stabilized without rotation, precession, offset, etc. The counterweight is located on the axis of the far ground side of the synchronous rail station, and is mainly used to maintain the straightening form of the 36,000 km long cable from the ground to the synchronous rail station.

The car is the main part of the load, and it travels along the cable between the ground station and the synchronous rail station, transporting materials and personnel. This is the main component of the space elevator, which has been verified by data from our simulation lab and proved to be feasible, and the next step is to select and build it. Wang Miao introduced the structure and simulation data of the space elevator project to Li Yang, and let Li Yang see the future of this project.

"That's good, the next site selection will be fortunate to you, as for the construction, the PDC has begun to contact the engineering team in Huaxia, and the construction is not a big problem. By the way, you should also pay attention to the mass production of nanomaterials, after all, this can be used for many projects. ”

"How can you say that you are happy, at least I am not alone, I have a family, and you are still alone, as a wall-facing person, you are more fortunate than me." Wang Miao looked at Li Yang, and he suddenly found that Li Yang's face had already taken off his immaturity, and now he had grown up.

Li Yang smiled and said: "You don't have to worry about me, I will go to the future in a few years and wait, it is better to be alone in such a world without worrying than to be sad at the end." ”

"You want to hibernate? Also, you wall-facing people have a big mission, and it will take a longer time to cross, so it's good to hibernat. ”

"Do you want me to help you apply for a hibernation indicator?" Looking at Wang Miao's already slightly tired face, Li Yang said something about helping Wang Miao apply for hibernation.

Wang Miao rejected Li Yang's kindness, his reason was that "I want to use my life to do something meaningful to mankind and accompany my family to the end, so I don't want to and won't choose to hibernate." ”

"Well, I respect your wishes, and if I can, I will help you take care of your offspring in the future."

"Haha, okay, then thank you in advance."

After that, the two continued to discuss the space elevator.

……

"We need to observe the Three-Body World immediately!" General Fitzrow told Dr. Ringer that they were in the control room of the Hubble-2 space telescope, which had been finally assembled a week earlier.

"General, probably not."

"I suspect that you astronomers are secretly doing their own work."

"I'd have done it long ago if I could do it, and Hubble II is still being tested."

"You're working for the military, just carry out orders."

"There are no military personnel here except you, and we are only doing what NASA has planned."

"Doctor, can't you just test that target?" The general's tone softened.

"The test target is strictly selected, there are various distances and brightness types, the test plan is formulated in the most economical way, so that the telescope's pointing only one rotation can complete the whole test, and now to observe the three-body world, you need to rotate the pointing at an angle of nearly 30 degrees and turn back, general, it costs propellant to turn that big guy, we are saving money for the military."

In order to get Dr. Ringer to give in, Fitzrow took out a picture of Dr. Ringer messing around and threatened him with it, and the result was obvious, Dr. Ringer said, "General, of course your orders must be carried out. Then the engineers immediately got busy.

The coordinate data in the target database was quickly called up, and in space, the cylinder with a diameter of more than 20 meters and a length of more than 100 meters began to rotate slowly, and the image of the starry sky began to translate on the large screen in the control room.

"Is this what the telescope sees?" The general asked.

"No, it's just an image from the positioning system, the telescope is a still photograph that needs to be processed before you can see it." After five minutes, the translation of the starry sky stopped, and the control system reported that the positioning had been completed. After another five minutes, Ringer said, "Alright, let's go back to the original test position." ”

Fizro asked in amazement, "What, it's already done?" ”

"Yes, the observations are now being processed."

"Can't you take a few more shots?"

"General, 210 shots have been taken in different focal lengths." At this point, the first observation image was processed, and Ringer pointed to the monitor and said, "Look, General, this is the world of the enemy you want to see." ”

Fitzrow saw only three halos on a pitch-black background, blurry, like street lamps in a foggy night, these were the three stars that decided the fate of the two civilizations.

They didn't find any stars in the Trisolar Galaxy, but after observation, they found the Trimaran Fleet four light-years away.

Ringer noticed Fitzrow, "General, let me explain it roughly: there is a patch of interstellar dust around those three stars, and before that, a group of high-speed moving objects passed through this dust, and their high-speed impact left a trail in the dust, which continues to spread, and now its cross-sectional diameter has spread to the size of two Jupiters, and the trail is only slightly different from the surrounding dust, so it is not visible at close range, and it can only be observed at a distance of four light years from us." ”

"I counted, and there were about a thousand." General Fitzrow said.

"Of course, it must be this number, General, we saw the Trimaran Fleet."

The discovery of the Hubble-2 space telescope finally confirmed the reality of the three-body invasion and extinguished the last illusions of mankind.

After a new round of despair, panic and confusion, mankind has truly entered a life facing the three-body crisis. Difficult times began, and the wheels of history, after a bumpy turn, began to move along a new track.

In the world of great change, the only thing that remains unchanged is the speed of time passing, and in a trance, five years have passed.