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In 2019, China's space agency sent Chang'e-4 to the far side of the moon for the first time, which is the Yutu-2 carried by Chang'e-4, and the two complement each other.
Before this, we all know that China's science and technology has always been relatively backward, including in aerospace technology has always been often complained about, but in recent years, China's aerospace technology can be said to have been a phenomenon in full bloom, we all know that the establishment of China's Beidou navigation satellite system is gradually improving, and, from the current point of view, China's satellite launch success has completely surpassed Russia in the second place in the world, Including our entire last year, the number of satellite launches completely surpassed that of the United States.
We all know that the Yutu 2, known as the city of rabbits in China, has just arrived on the moon, and it didn't take long for the treasure to be found on the moon, you know, the United States has landed on the moon six times without finding it, which is also before that, people have always thought that the back side of the moon is too mysterious, especially when the Apollo astronauts landed on the moon, they also sent out the message of being warned by the moon people.
After China sent Yutu-2 to the far side of the moon, people really understood that the back side of the moon is the same as the front of the moon, both of which belong to the barren area, because instead of the earth, it blocks the impact of many planets and meteorites, and the Aite basin on the far side of the moon is all potholes.
After that, the relay star also sent back a picture of Yutu 2, which was photographed on the far side of the moon to the earth, and until now, the mystery of the far side of the moon has been solved, which is a height that Americans cannot reach.
So far, the most leading country in aerospace technology is the United States, but China has only taken a few decades, has been completely parallel with the United States, in fact, in some aspects has completely surpassed the United States, including China's Beidou navigation satellite system, once built successfully, it will be ahead of the GPS system, which is something we should be proud of.
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Because of their bad luck, our Jade Rabbit traveled far and every corner was reached, and the details were very well done, so they found it.
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It may be that the technology in the United States is not so mature, or it may be that they have a signal problem. It is also possible that there were some failures in the middle of the process, and they were not dealt with in time, so they were not discovered.
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Because the technology is more mature and advanced, it is possible to carry out projects that were not available before.
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Unless you land in the same place, or within the detection range of the Jade Rabbit, you can't find it. The moon is not only a square kilometer the size of a palm. When you arrive in Beijing, you will definitely see the sign on my doorstep?
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First, Yutu discovered a new type of basalt, and the scale of this basalt unit is huge. The particle excitation X-ray spectrometer obtained the accurate content of 12 elements of lunar soil. Compared with the lunar soil in the Apollo Moon Sea Basin, we found that the lunar soil at the Chang'e-3 landing site had higher iron and titanium content, while lower aluminum content, showing a completely different composition, indicating that the basalt underneath it is a new type of absolution.
In addition, the lunar soil here is rich in potassium, zirconium, yttrium, niobium, indicating that this basalt is mixed with 10-20% of the Cripp component. According to the Yutu detection results, the basalt may have been formed by the partial melting of the source area of the lunar mantle rich in iron and titanium, and then mixed with the kripping rock layer at the base of the lunar crust during the uploading process, and finally overflowed the lunar surface and filled the Yuhai Basin. Importantly, radar detected a thickness of 195 meters in this young basalt formation, suggesting that there were large-scale volcanic eruptions in the Yuhai Basin up to 2.5 billion years ago.
Secondly, for the first time, Yutu used radar to measure the thickness of lunar soil on the lunar surface. Borrowing signal processing techniques such as instantaneous spectrum analysis and offset imaging in the field of exploration, we obtained the structure and thickness of the lunar soil in the landing zone. The lunar exploration radar profile shows that the lunar soil has a layered structure, with the top layer about a meter thick and uniform texture, almost no stones, and the bottom boundary has certain undulations, with an average thickness of about 5 meters.
Since the lunar soil is formed by asteroids impacting the surface rocks of the moon, the older the geological age, the greater the thickness of the lunar soil. The age of the Chang'e-3 landing area is significantly smaller than that of other lunar sea areas, but the measured lunar soil thickness is significantly larger than the 2 4 m estimated by other indirect methods, indicating that the lunar soil thickness of the whole moon may be underestimated. Since important resources such as helium-3 and hydrogen are mainly found in lunar soil, this discovery will have a great impact on the estimation of the reserves of these important resources.
In addition, Yutu also performed chemical composition and spectral analysis of the original lunar soil on the lunar surface, and the results can be used as the correction standard value of the lunar orbit remote sensing detection data, improving the interpretation accuracy of the chemical composition and mineral composition of the whole moon. Orbital remote sensing can detect the chemical composition distribution of the whole moon, but the accuracy and accuracy are poor. On the other hand, in-situ measurements have high accuracy and accuracy, but can only detect a specific location. In the absence of in-place measurement data, it is quite difficult for scientists to assess the precision and accuracy of orbital remote sensing data.
The in-place detection data returned by the Yutu is equivalent to providing a comparable standard for the orbit measurement data, because this site has both the in-place detection data and the orbit detection data. By comparing it to the in-place sounding data, scientists can make corrections to the way the orbital sounding data is processed, improving precision and accuracy.
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