February 28, 2018.

After 50 years, with the efforts of generations of aerospace workers, the greatest moment in the history of Huaxia Aerospace has finally come.

"Chang'e 11, are the preparations completed?"

"Done!"

"Chang'e 11, are you ready?"

"Report to the control center, ready!"

"Listen to me, reverse engine ignition!"

"Reverse engine, ignition successful!"

As the reverse engine starts, Chang'e-11 decelerates again after making half a circle in an elliptical orbit, and continues to decelerate.

As we all know, the recovery of satellites, as well as the change of orbit of high-orbit satellites to low orbits, are done by deceleration.

Because of the slower speed, the gravitational force of the earth on the satellite is greater than the centripetal force required for the satellite to move in a circle around the earth, and the satellite will be pulled by gravity towards the earth.

In the same way, the launch of a high-orbit satellite is achieved by accelerating, first launching the satellite into a low orbit, and then letting the satellite accelerate to fly towards a high orbit.

To put it simply, the principle is the confrontation between centripetal motion and centrifugal motion, gravitational force and centripetal force!

At this moment, Chang'e-11, if it wants to land on the moon, it will have to jump from high orbit to low orbit and carry out centripetal motion.

So, slow it down, slow it down as much as you can, and be pulled towards the moon by the gravitational pull of the moon!

Jump from high orbit to low orbit.

"Chang'e-11 is constantly decelerating, the reverse engine is running normally, and the altitude from the moon is also continuing to decrease!"

"230 km, 208 km, 196 km......"

"In good condition!"

Ground control watched nervously.

At this moment, Ying Yue and the others were tied to their seat belts, and as the spacecraft bumped all the way, when they descended to a certain height, they could see the surface of the moon through the glass window.

"Sure enough, it's full of craters and craters!"

Ying Yue sighed.

The eagle-headed god also nodded again and again, he was much more excited than Ying Yue, and the whole person was completely free of the light and cloudy on the earth, and became extremely excited.

Shortness of breath, chest heaving violently, face flushed.

As you can imagine, he waited for a day, it was too long, too long!

As the descent continued, the reverse engine suddenly stopped, and then the landing engine at the bottom of the ship ignited successfully.

This also means that the spacecraft began to fall towards the surface of the moon under the action of lunar gravity, which means that the lunar landing operation has entered the final moment.

"The landing engine was ignited successfully!"

"Chang'e-11 keeps descending!"

"Chang'e-11 is starting to slow down!"

"Down!"

"Slow down!"

Chang'e-11 fell to a certain extent and began to decline at a uniform speed.

"It's the final landing moment!"

"Chang'e 11, manual control, find a suitable landing site!"

"Roger!"

Through the glass windows, you can see the jumble of pebbles and uneven ground below, which is not an ideal landing spot.

Chang'e-11 can only continue to fly, looking for flat land.

Finally, after flying forward for some distance, a flat corner was found, and then, under the manual control of the astronauts, a smooth landing.

"Bang-"

Finally, there was a slight touch of ground from below, and Chang'e-11 directly stopped falling and successfully landed on the surface of the moon.

"It worked!"

"Chang'e-11, successfully landed on the moon!"

"See?"

"Did you see that?"

"They succeeded!"

"They succeeded!"

At the moment when Chang'e-11 landed smoothly on the moon, an unprecedented burst of cheers suddenly erupted in the entire control center.

Everyone jumped high, danced and roared excitedly, and let out a tsunami of cheers that almost broke the ceiling.

With tears in their eyes, people hugged each other, patted each other on the shoulders, roared and whispered to each other, venting their excitement and happiness in their hearts.

Dean Wang hugged an old expert with gorgeous hair beside him tightly, patted his back constantly, and cried and laughed: "Lao Zhu, it's successful, we have succeeded, Chang'e 11 has succeeded, have you seen it?" ”

"See! I see it! Woowoo woo ......"

Countless experts hugged their heads and cried, countless aerospace workers burst into tears, and countless people were so excited that they couldn't help themselves.

I've been waiting for this day for too long!

But luckily, it's finally here!

This scene lasted for nearly ten minutes before it gradually calmed down, and people wiped their eyes and turned their heads to look at the big screen again, looking at the spacecraft quietly sitting on the surface of the moon.

"Call the control center, this is Chang'e 11!"

"Call the control center, this is Chang'e 11!"

At this moment, the astronaut's voice sounded from the stereo on the side of the big screen, with a hint of noise, not very clear, but clearly heard throughout the hall.

"Voice, it's Xiao Huang's voice!"

The commander-in-chief of the moon landing, that is, the white-haired old man called Lao Zhu by Dean Wang, grabbed the microphone and responded in a trembling voice: "Received, this is the ground control center!" ”

As if he was afraid that Chang'e 11 would not be able to receive it, Lao Zhu said again: "Received!" This is the ground control center! ”

"Report to the control center, we have successfully landed, and now we can't wait to go out and take a look at this mysterious land, I don't know if it's okay?" Xiao Huang said excitedly.

"Control Center ROCE!"

Lao Zhu took a deep breath, suppressed the excitement in his heart, and said, "Chang'e 11, I now order you to stay in the cabin first, sleep beautifully, and then have a good meal!"

Finally, check the ship's instruments, fuel equipment, oxygen supply, and check everything accurately before trying to land on the moon! ”

"Chang'e 11 received!"

For the command of the control center, although the three astronauts could not wait, they still faithfully carried out the order of the control center.

At such times, the ground control center is always the most sensible!

"Hoo ......"

Lao Zhu, the commander-in-chief of the moon landing, put down the microphone, wiped the cold sweat on his forehead, and let out a long breath, he has commanded countless satellite launches in the Jiuquan Satellite Launch Center for so many years, but he has never felt so nervous as this time.

At this moment, Thunder God and Wolf God and others came over and said with a smile: "Lao Zhu, it's time to let our people out!" ”

Lao Zhu was stunned: "Don't they need to rest?" ”

"No need!"

Thor shook his head: "The spacecraft of the Temple of the Gods has landed 20 minutes ago, although it is farther away from the Galileo crater than Chang'e 11, but we can't rest!" ”

"We must get ahead of them and get to the Galileo crater!"

The wolf god also said solemnly.

"Alright then!"

Lao Zhu nodded slightly, this operation is divided into two aspects, their satellite launch center is only responsible for sending people to the moon, as for the rest, they can't control it.

Because it's an order from above!

"Call Chang'e 11, please answer if you receive it!"

"Call Chang'e 11, please answer if you receive it!"

"Chang'e 11 received!"

Lao Zhu said: "Listen to my order, let the two comrades of the special department prepare and prepare to go to the moon!" ”

"Ah......h

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