Reborn Tech Scholar

Chapter 443 The Miraculous Falling Moon
The engine of Chang’e 100 reverses the brakes and continuously reduces the descent speed. The Chang’e 30 probe descends slowly. Under the support of the reverse thrust rocket engine, it gradually descends to a height of [-] meters. After a short hover, it begins to enter the evasion In the obstacle stage, there are only [-] meters left.

Then it landed on the moon with a very graceful posture, and this scene was transmitted back to the ground command center on the earth 38 kilometers away through the relay satellite, and then it was watched by everyone who followed it under the global live broadcast.

With more than [-] million people watching the live broadcast, the solar panels of the lander are opened, the transfer mechanism of the lander is unlocked and unfolded, the solar panels and mast of the patrol are deployed, the patrol is moved to the transfer mechanism of the lander, the transfer mechanism of the lander is unlocked, and it descends , the rover was transferred from the lander to the lunar surface, and after the mutual shooting of the two devices was completed, the detection work was started separately.

At this moment, countless people cheered excitedly. I don’t know how many descendants of Yan and Huang burst into tears at this moment. The touch in the depths of the soul hits people's hearts directly.

On the CCTV live channel, the invited guests applauded excitedly, and popularized the significance of the Chang'e-[-] probe to the people at this moment!

"Viewers, the landing site of the Chang'e-180 probe is located at the Von Karman crater at the South Pole on the back of the moon. The Von Karman crater is a huge ancient impact crater with a diameter of about 45.5 kilometers. It was formed about 39.2 billion to [-] billion years ago. It is named after the famous Hungarian-American engineer Theodore von Karman. It is worth mentioning that von Karman was Qian Lao’s mentor. When it was just formed, there was magma flowing inside the von Karman crater. The result is a very flat southern area. There is a small peak in the central area of ​​the crater, which connects to the rough terrain to the north."

"Von Karman crater is located in the larger Aitken Basin, which is named after American astronaut Robert Grant Aitken. The basin is about 2500 kilometers in diameter and 13 kilometers deep, from the deepest bottom to the highest point The drop is about 16 kilometers. This is the largest and oldest impact crater known in the solar system. 90% of its area is distributed on the back of the moon, and only a small part is on the front of the moon. The basin preserves the rocks of the original moon crust, collects The data of rocks in this area can help scientists better understand the composition of the moon, which is of great scientific research value."

"In order to ensure the smooth landing of Chang'e-[-], the landing site must be flat enough. In addition, there must be suitable light. The latitude where the Von Karman crater is located can ensure sufficient light without being directly exposed to the hot sun. Because It landed on the far side of the moon, and it was unable to communicate directly with the earth during the power-down process of the lander, so it had to rely on the "Magpie Bridge" relay satellite for signal transfer."

The invited experts introduced to you the place where the Chang'e-[-] probe landed and the difficulty of landing, which is several times more difficult than the Chang'e-[-] probe landing from the front of the moon.

Moreover, the time it took for the Chang'e-[-] probe to travel from the earth to the moon is much shorter than that of the Chang'e-[-] probe, and the orbit is also very different. The addition of two relay satellites shows that China has made great progress in aerospace technology. The huge progress has also drawn a successful conclusion to the second phase of the lunar exploration project.

"Are you curious about why the moon has a back? This starts with the tidal force. When we are at the seaside, we can directly see the phenomenon of ebb and flow. This is due to the tidal force of the sun and the moon on the earth. .When the tide enters the terrain of the trumpet mouth, the water level rises more obviously, such as the tide of the Qiantang River in my country."

"Because the moon is much closer to the sun, the tidal force on the earth is about twice that of the sun, so we focus on the tidal force on the moon on the earth. The earth and the moon can actually be regarded as a binary star system. The non-uniform gravitational field of the moon adds The rotation of the upper earth around the center of mass of the system causes a "bulge" on the side of the earth close to the moon and on the side far away from the moon. These two "bulges" will brake the rotation of the earth, which is why the earth turns more and more The reason for the slowness is that a leap second will be added in a few years. Similarly, the earth's tidal force acts on the moon in the same way, making the moon's rotation gradually slow down, and finally makes the rotation period equal to the revolution period, and no longer slows down , this phenomenon is called "tidal locking" in astronomy."

"After the tide is locked, the moon has only one side facing the earth, just like a person looking around you, you can only see his front, not the back. Of course, because the moon has a "balance" "Motion" phenomenon, the area of ​​the moon that can be seen on the earth can reach 59%. The main reason is that the moon's orbit is actually an ellipse and the rotation axis has an inclination angle with the white plane."

The experts introduced some knowledge about the moon. The moon is the natural satellite of the earth and the closest large celestial body to the earth. Human beings have been interested in the moon since a long time ago.With the advent of the industrial age, human productivity has greatly improved, and technological means and tools have also improved a lot. The detection and understanding of the moon is far beyond any other era.

But even so, in fact, human beings know very little about their neighbors, even experts, let alone ordinary people.

Even in China, where there is a scientific soil, ordinary people know that the moon is the closest large celestial body to the earth, it is the earth's natural satellite, and it is related to the ebb and flow of the tide.

They don't know at all that what people see now is always only one side of the moon, that is, the front side. As for the back side, it cannot be observed from the earth.

As for the von Karman crater, who knows what it is.

"As early as 1959, the former Soviet Union's Lunar No. 1965 probe took pictures of the back of the moon for the first time, and successfully sent the images back to the earth, and made the world's first lunar globe. In 25, the former Soviet Union's "Luna III" probe When the USS "flyed by the moon, it sent back 95 clearer photos of the back of the moon. From the photos, it can be seen that there is a chain of hundreds of kilometers of craters. According to these precious photos, the new moon The instrument contains [-]% of the moon's surface."

"We all know that the Apollo 11 spacecraft completed the feat of manned first manned landing on the moon. Armstrong's famous saying of "one small step for man, one giant leap for mankind" seems to be echoing in his mind. Before that, in December 1968, Apollo 12 The space shuttle entered lunar orbit for the first time and returned to Earth after completing the orbit around the moon. The three astronauts became the first human beings to see the back of the moon with the naked eye. Been to the far side of the moon."

"In 1962, the American space agency's "Prowler" lunar probe was unable to work due to a computer failure, and finally hit the back of the moon and was smashed to pieces. It became the first probe to land hard on the back of the moon. Of course, no useful information was sent back. Data. From 1966 to 1967, NASA obtained a large amount of information about the far side of the moon through the series of probes of the "Lunar Orbiter" project."

"The Chang'e-2 probe realized the first soft landing and inspection on the far side of the moon, and realized the relay satellite communication between the probe on the back of the moon and the ground station. It is the first time in the world to realize very low frequency radio astronomy observation on the back of the moon. The accuracy is first-class in the world, and it is also the first time in China to realize the space application of isotope nuclear batteries. It is also the first time in the world to carry out the reflective laser ranging test beyond the distance between the earth and the moon. And the low-frequency radio astronomy observation research of the Earth-Moon L[-] point!"

Experts gave a very high evaluation to the Chang'e-[-] probe's successful soft landing on the back of the moon. After all, the breakthrough made by the Chang'e-[-] probe this time is obvious to all. The technology that comes out expresses admiration and envy.

And in the command center on the ground, there was also warm applause. This time, the Chang'e-[-] probe achieved a very perfect soft landing, and the landing posture was very graceful. This represents their great success, that kind of joy and achievement. Only those who sincerely love aerospace and are willing to dedicate their lives to the aerospace industry can truly feel it.

However, at this moment, the team showed strong psychological quality and professionalism, and the commander-in-chief said: "Report the current status of the Chang'e-[-] probe!"

"The engine is running normally, as originally predicted!"

"All the scientific load instruments in the detector are not damaged and can be used normally!"

"The Yutu-[-] lunar rover is not damaged, and it can go out of the cabin to perform exploration missions at any time!"

"The signal receiving system is normal, but the signal is delayed for three seconds!"

"The thermal control system is normal, the detector temperature..."

It can be said that the mission this time is perfect. The Yutu-[-] lunar rover, which is responsible for the survey mission on the back of the moon, can also go out of the cabin to perform missions at any time.

The Chang'e-[-] probe is the backup of the Chang'e-[-] probe, but its breakthrough and significance are even greater than that of the Chang'e-[-] probe.

Its success means that Huaxia has officially drawn a successful conclusion to the second phase of the lunar exploration project, and can enter the third phase of the lunar exploration project with the best posture.At the same time, it also represents that Huaxia has made a series of breakthroughs in aerospace technology.It also means that as the Chang'e-[-] probe probes on the back of the moon, China's understanding of the earth will continue to increase, and it will also lay a solid foundation for China's manned landing on the moon.

Qin Yuanqing looked at the busy ground command center, smiled, and left the command center silently. After all, although he has contributed a lot, the honor and applause should belong to this team. It is they who constantly overcome difficulties and make technological breakthroughs time after time , Only today, they should get the honor and applause they deserve.

As for him, he no longer needs these honors and applause, he already has no shortage of these, and having them is not even the icing on the cake.It doesn't hurt to have none of these.

(End of this chapter)