At the Jiuquan Satellite Launch Center, a huge rocket with a height of 55 meters and a maximum diameter of 4.5 meters is preparing for launch. At the top of the rocket, a hatch that can only allow ordinary adults to bend down and turn into it is open, Xia Yu is standing outside the hatch at the moment and watching his teammates, one after another, shaking hands, hitting shoulders, and then watching his teammates get into the hatch, when the five people continue to enter, only Xia Yu is alone, Xia Yu glanced at the person in charge of the tower site, nodded at the other party, and then also turned around and drilled in.

When the hatch was closed and nothing abnormal was confirmed, the person in charge of the tower site notified the personnel of the command center of the satellite launch site that all the personnel had entered the rocket, and Xia Yu firmly fixed himself to the seat like everyone else after entering the cabin, and then checked the instruments with Luo Xiang, the astronaut responsible for driving the Shenzhou spacecraft.

"Fifteen-minute countdown to ignition, please leave immediately for launch site personnel." The on-site command center conducted command and scheduling, and the staff on the launch tower also began to evacuate as planned, and after Xia Yu and Luo Xiang finished the inspection, they immediately notified the on-site command center that all staff were ready, and the busy command center began to implement the final procedures after getting the information from Xia Yu's side.

"The three-second countdown to ignition begins." In front of the console, the staff member in charge of pressing the ignition button said loudly: "Three, two, one, ignition!" As he finished speaking, he pressed his thumb hard against the big button.

The moment the ignition button of "Boom ......Rumble" was pressed, the main thruster at the bottom of the rocket and the four auxiliary thrusters were ignited at the same time, and the huge crimson flame evaporated the huge amount of water stored in tons in the bottom diversion trough, and the gas that covered the sky and the sun was led around by the deflector trough, and then rose into the air, and the rocket was also pushed off the ground by the huge flame that was longer than itself at this time, and began to rise into the air.

The air is shaking, the earth is shaking, the eardrums are shaking, and the heart is shaking with the huge rocket that takes off into the sky. In the command center of the Jiuquan satellite launch site, a bunch of scientists were nervously staring at the flight attitude of the rocket in the air, and at the same time, someone kept reporting the real-time flight parameters of the rocket. ”

Applause was overwhelming, everyone at the Jiuquan Satellite Launch Site was proud of the successful launch of the rocket, they were rejoicing, happy that the rocket sent the astronauts into space, and applauded their own efforts, but they did not know what this group of astronauts was going to do, in the eyes of the staff of the Jiuquan Satellite Launch Site, this was just another success of countless rocket launches, and after the mission was completed, they could finally have a good rest, nothing more.

In the command center of Beijing Aerospace City, all the people are busy, on the huge wall display screen, not only the real-time number of rocket flights, but also the orbit that the rocket will enter and other information are all pre-set, it has always been the case, the rocket will eventually be taken over by the command center of Beijing Aerospace City.

"The second-stage rocket booster is detached and is falling according to the predetermined trajectory, the rocket is flying in good attitude, and the first-stage rocket booster is working normally." The staff in charge of monitoring shouted in the hall, and with his voice, in low earth orbit, the Shenzhou spacecraft, which had lost two booster rockets, was being propelled into the predetermined orbit by the last rocket booster.

In the dark space, the blue planet is at his feet, but Xia Yu and Luo Xiang don't have time to see the scenery now, manned lunar flights and launching satellites to the earth's orbit are two different things, you must do accurate calculations, any kind of waste in space is extremely luxurious, especially the precious fuel.

The solid rocket engine is still spraying flames, pushing the Shenzhou spacecraft to circle around the earth, because of the launch window, the Shenzhou spacecraft can only circle the earth twice, and then enter the Earth-Moon orbit and start flying to the moon, which takes 102 hours, that is, four and a half days, and then it takes half a day to make the Shenzhou spacecraft stable in orbit around the moon before it can make a soft landing, five days, an adventure to the moon, Xia Yu and other six people are ready.

Flying in space, most of the time only use inertia to advance, for aircraft that can only use fossil chemical fuels, fuel is too precious, so even if Xia Yu's Shenzhou spacecraft still carries fuel and small auxiliary rocket boosters, it is still not used, and the adjustment and acceleration of the spacecraft's attitude are completed by plasma engines.

In space, the plasma engine is the most promising space engine technology, today's satellites and other space vehicles have long been applied to the plasma engine, but because of the thrust-to-weight ratio of the miserable relationship, it is generally only a small engine for attitude adjustment, want to get rid of the earth's gravity, the current plasma engine can not even bring an ant, so the most suitable environment for the plasma engine is undoubtedly the weightless environment of space.

Because the Shenzhou spacecraft was helped by the earth's gravity and rocket boosters before, the speed was not slow, and the energy consumed by the plasma engine was almost negligible, so Xia Yu and Luo Xiang actually had nothing to do after setting the route of the Shenzhou spacecraft.

After the last scheduled communication, Xia Yu said that everyone could rest, and he fixed himself before he began to sleep. Sleeping in a weightless environment that he hadn't felt for a long time, Xia Yu got used to it a little before falling asleep. And in the next few days, in addition to the contact for a fixed period of time, the only thing that can be done is to slow down the spacecraft at the predetermined deceleration point, until it is ready to enter the lunar orbit, Xia Yu and Luo Xiang have something to do.

"Fifteen minutes to the point of entry into the lunar orbit." Xia Yu looked at the display screen and reminded, "Prepare to slow down." ”

"Understood." Luo Xiang replied, stretched out his hand and switched various instruments on the dashboard in front of him and on his head, and then said: "The engine is ready to start, ready to decelerate." ”

"Roger, a ten-second countdown to the engine on." Xia Yu read the countdown, and when Xia Yu counted down the numbers, Luo Xiang immediately let the engine work, and the continuous deceleration made everyone rush forward, if it wasn't for the fixation of the straps, I am afraid that he would have flown out and hit his front. However, when the deceleration was completed and the spacecraft entered orbit around the moon at a constant speed again, the rare sense of gravity in the past few days disappeared again.

"Successfully entered the orbit around the moon." Luo Xiang looked at the workbench in front of him and said, "It's flying around the moon." ”

As Luo Xiang's words fell, the others looked at the moon one after another, this was the first time that everyone except Xia Yu had watched the moon at such a close distance, so they were very curious. Looking down at this height, because there is no influence of air, the plains, craters, and deep valleys on the lunar surface are all clearly visible, causing everyone to be amazed, but at this time, a large triangular plane that looks too damaged and has almost half of its wings is gone, appeared less than two kilometers in front of the spacecraft, and was slowly overtaken by the Shenzhou spacecraft.