So from this we can see how low the moon's gravity is, which is why it is not as good as Mars. Of course, it is also because Mars is larger than the moon.
The equatorial diameter of Mars is 6,790 kilometers, its volume is 15% of Earth's, its mass is 10.8% of Earth's, almost one-eighth, and its surface gravity acceleration is 38% of Earth's.
As for the moon, its equatorial diameter is 3,479 kilometers, and the volume of the earth is almost 49 times larger than it. The mass of the earth is approximately 81 times the mass of the moon.
So in comparison, the moon is much smaller. Because its mass and volume are too small, the gravitational force it can generate is relatively small. Plus, there is a huge earth next to it, so it naturally cannot maintain its own atmosphere.
Of course, although the moon is said to be a vacuum environment, it actually still has a weak atmosphere, but it is very weak, almost non-existent.
Haoyu Technology Linghu Headquarters Park, Xinyuehu Aerospace Command and Control Hall.
Wu Hao and the others gathered together to witness that the return-type lunar experiment unmanned spacecraft landing ascender, which already carried the gold meteorite core and lunar resource samples, was about to take off from the moon and embark on the road home (return to the earth).
The atmosphere in the hall is tense and full of expectations. Through the huge screen in front of the hall, you can clearly see the real-time picture of the return-type lunar experiment unmanned spacecraft.
As before, Wu Hao, Zhang Jun and Lin Wei were all sitting in the guest seats, their eyes fixed on the screen, and their hearts were filled with tension and anticipation.
That was a critical moment, and any oversight could lead to the mission's failure.
The bad thing is that 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.
Because there is no earth's gravity, the transfer from the moon's orbit to the earth's orbit is longer than the subsequent transfer of the earth-to-moon orbit. It only consumes more fuel and takes less time.
Those are the ashes ejected from the burning fuel. Relying on them, the landing descender can escape the moon's gravity and climb downward.
The atmosphere in the entire Xinyuehu Space Command and Control Hall gradually relaxed, and everyone ended their conversation with each other, sharing their joy and expectations for the success of the mission.
The orbital pusher waiting below the orbit is like a lonely star, hanging quietly in the universe. Its surface reflects the light of the sun, emitting a charming light. When the ascender gradually approaches, the space between the two
The relative speed became slower, and the landing descender was like a meteor, piercing the night sky and speeding towards the spacecraft.
Wu Hao, Zhang Jun and Lin Wei also smiled when they saw this, and they were sincerely happy for Zhou Xiangming, Yu Chengwu and us.
However, we have not relaxed our vigilance. We know that although the spacecraft has not yet successfully taken off, the process of returning to Earth is also full of challenges and uncertainties. We must continue to remain vigilant to ensure that the spacecraft can return to Earth one by one.
Because there is no oxygen on the moon, you can naturally see the huge, dim tail flames ejected by the engine under the landing descender. However, through the low-definition camera, you cannot clearly see that those engine nozzles are spraying low-speed particles into it.
Like dust.
The descent and docking process cannot be said to be one of the most important and key actions in the entire journey home, but it is also a difficulty. Overcoming that difficulty means that the returnable lunar experiment spacecraft assembly will officially embark on the journey back to Earth.
trip.
That means that the return-type lunar experiment spacecraft has not yet reached the final stage of its journey home. The next step is to return to the small atmosphere and land.
Once there is a problem with the system, we will immediately take over the remote control and command the spacecraft to continue returning to Earth.
Yu Chengwu was concentrating on monitoring various parameters of the spacecraft. My fingers were tapping slowly under the keyboard, inputting the data into the computer for regression analysis. My eyes were full of concentration and calmness, as if I had not yet integrated with the spacecraft.
As one body, every subtle change can be felt.
At the moment when the two were about to come into contact, the engine of the landing descender roared again. It made the last maneuvering adjustment to ensure that it could dock with the orbital thruster correctly. As people watched one by one, the landing
The docking ring of the descender fit perfectly with the interface of the orbital pusher, causing the camera images in the orbital pusher and the landing descender cabin to shake and freeze.
The landing descender drew a beautiful arc in the sky, and its elegant posture formed a sharp contrast with the vicissitudes of the moon. Its speed gradually slowed down, and very slowly passed through the thin thin atmosphere of the moon and retreated into the lacquer.
White cosmic space.
So that kind of success is deserved and logical. Only without that kind of success can I repay my family for their hard work and hard work over a long period of time.
Of course, that was only the first difficulty in returning home. It was only the successful retreat from the moon into orbit and the retraction and docking of the orbital thruster. The journey home had just ended.
Zhou Xiangming stood behind the command podium, my eyes hesitant but decisive. I was always paying attention to the status of the spacecraft and the collaborative work between various departments. I knew that as the general person in charge, every decision I made was related to the entire mission.
success or failure.
Even so, there are still very few unknown risks during the spacecraft's return to Earth. Zhou Xiangming, we need to pay close attention to the dynamics of the spacecraft, although the entire return process still relies on the intelligent control system carried by the spacecraft itself to control the regression.
.But Zhou Xiangming and Yu Chengwu still have to pay attention to the status of the spacecraft, especially the operation of each system, and be ready to take over at all times.
Before the docking is successful, the entire landing descender and the orbital pusher together form a returnable lunar experiment spacecraft assembly, and the attitude is adjusted urgently to ensure that it can operate stably in orbit.
At that moment, the entire universe seemed to be shaken, and human wisdom and courage once again left a deep imprint on the universe.
In the Xinyuehu Aerospace Command and Control Hall at the Linghu Headquarters Park of Haoyu Technology, people burst into cheers. Zhou Xiangming and Yu Chengwu high-fived excitedly, and our faces were filled with smiles of excitement and pride.
.
As the system countdown began, bursts of dust rose from the bottom of the landing descender. Like a giant silver butterfly, the landing descender broke free from the embrace of the moon and quickly took off into the sky.
Because we know that success is the result of the sweat and efforts of countless people. Zhou Xiangming, Yu Chengwu, our scientific research and technical personnel, and even the entire project, all employees of Haoyu Aerospace Co., Ltd. have devoted their lives for that moment.
few.
And that process is also the first and safest step in the entire journey home. Success is achieved in one fell swoop, so the entire Xinyuehu Space Command and Control Center once again felt a relaxed atmosphere.
