Once there is a problem with the system, they will immediately take over the remote control and command the spacecraft to continue returning to Earth.
Fortunately, the intelligent control system of the spacecraft performed very stably. After dozens of hours of flight and orbit changes, the spacecraft finally reached the earth's orbit.
This means that this returnable lunar experimental spacecraft has reached the final stage of its journey home, and the only step left is to return to the atmosphere and land.
And this process is also the last and most dangerous step in the entire journey home. Success or failure depends on this, so the entire Xinyuehu Space Command and Control Center once again filled with a tense atmosphere.
As the spacecraft slowly entered the earth's landing orbit, the tense atmosphere once again filled the Xinyuehu Space Command and Control Hall. Wu Hao, Zhang Jun and Lin Wei were sitting in the guest seats, their eyes tightly locked on the real-time picture on the screen, looking forward to it
The moment the spacecraft returns safely.
Yu Chengwu stood in front of the command podium, his eyes shining with determination. He knew that although the spacecraft had successfully entered the earth's orbit, the next task was still arduous. He stared closely at the data on the screen, always preparing for possible emergencies.
emergencies.
Zhou Xiangming was concentrating on monitoring various parameters of the spacecraft. His eyes were full of concentration and calmness, as if he had become one with the spacecraft and could sense every subtle change in it.
The spacecraft slowly adjusts its attitude in Earth orbit, making final preparations for the upcoming return to the atmosphere and landing.
This is a process full of challenges, and any oversight may lead to mission failure. Zhou Xiangming and Yu Chengwu worked closely together, always paying attention to the status of the spacecraft to ensure that everything was as planned.
According to the preset instructions, the returnable lunar experimental spacecraft assembly will retreat and separate. The orbital pusher will send the landing descender down and return to the small atmosphere orbit. It has not completed its entire mission. It will
It will retreat and separate from the landing descender, then fall into the small atmosphere along the preset trajectory and burn up under the South Pacific.
The first is the open return lander that is released first, and the first guide parachute ends in the parachute cabin on the top of it.
Before being thrown out, the huge parachute was quickly filled with airflow, and then the first parachute cut off on its own and was thrown away.
Immediately afterwards, very slowly, the return capsule located on the top of the landing descender also retreated and separated from the landing descender in a puff of smoke.
It's just that due to the action of low-speed airflow, a layer of hot plasma will form on the surface of the open return lander and return capsule, blocking people's sight. That's not what you call a white barrier.
During that process, the signals from the open return lander and the return capsule will be disconnected from the ground. People on the ground can only retreat and wait, hoping that the spacecraft can successfully break through the barrier.
As the guide parachute is thrown out, it expands in the small air layer, forming huge pressure and pulling the first deceleration parachute apart.
Zhou Xiangming and Yu Chengwu watched the data changes on the screen with ease, our heartbeats synchronized with the trajectory of the spacecraft.
As for the orbital thruster, before watching the landing descender move away, it will start the engine, use the forward fuel it carries, retreat and change orbit, fall into the small atmosphere according to the preset trajectory, and finally end up in the South Pacific.
It turned into a magnificent fireworks in the sky and completed its mission.
When the spacecraft assembly completed the initial adjustments under the earth's orbit, Zhou Xiangming took a deep breath, and my eyes were locked on the data under the screen. I knew that the subsequent separation process would be the most critical part of the entire mission.
Ring. I have to maintain a low level of vigilance and concentration to make sure every step is correct.
As for the landing descender, it will fly along the return orbit, and then use its own attitude engine and orbital engine to adjust the angle and speed of the entire landing descender so that it can fly at a suitable angle, speed and orbit.
Manned small atmosphere.
As for the orbital descender itself, it has completed its mission. It has not gradually disintegrated into fragments under the ravages of low speed, low temperature and low pressure. It is burning in the small atmosphere, like a long tail following the open return.
The lander and return capsule slid down in the sky.
They were flying in the small atmosphere with a stable attitude, retreating towards the scheduled landing site. Seeing that scene, all the staff in the entire hall cheered excitedly, and our faces were filled with smiles of joy and pride.
.
The open return lander and return capsule will retreat into the small atmosphere along the predetermined trajectory.
Bang bang bang...
At this moment, the mission of landing the descender has been successfully completed. Next, let’s look at the respective performances of the open return lander carrying the gold meteorite core and the return capsule carrying lunar resource samples.
bad!
The landing descender continues to fly along the return orbit, and its mission is to safely return the open return lander and return capsule to Earth.
A few minutes ago, the plasma layer gradually dissipated, and the return capsule and open return lander appeared under the screen again.
There was a brief burst of useless applause outside the small hall, and then silence returned again.
As those seven, including the landing descenders that retreated into the small atmosphere together, became slower and slower, their surfaces were rubbed by the low-speed passing air, and their surface temperatures also slowly rose.
Through the camera in the cabin under the orbital descender, you can hardly see that the landing descender is quickly moving away and embarking on its own way home.
It is an extremely safe process. Whether it is an open return lander or a return capsule, they must withstand extremely low temperatures and pressures before they can land dangerously.
It was an exciting moment. The entire Xinyuehu Aerospace Command and Control Hall was filled with cheers and applause. People hugged each other to celebrate that historic moment. Wu Hao, Zhang Jun and Lin Wei also stood up excitedly, our faces
A smile filled with joy and pride.
Of course, the entire landing journey has not yet begun.
As the landing descender gradually approached the small atmosphere, the camera in the cabin flickered, and then the open return lander at the landing descender separated from it, starting its own journey home.
That was the signal that the separation of the spacecraft assembly was over. The data flashed under the small screen showed that everything went well. At the predetermined low altitude and speed, the orbital pusher and the landing descender were successfully separated.
Before all that is completed, the landing descender will wait for an opportunity to release the open return lander carrying the gold meteorite core fixed under it, as well as the return capsule containing lunar resource samples.
Suddenly, the data on the screen stopped changing slowly. Wang Yahe and Yu Chengwu's pupils narrowed. Then when they saw the data displayed on the screen, the seven of them breathed a sigh of relief, then looked at each other and smiled, and continued to invest.
