was almost the hope that the Chinese Chiang & # 39; 4 # will make magic discoveries. Having analyzed the lunar crust, however, the mission also became unexpected.
In a study published in Nature on May 16, scientists from the National Astronomical Observatory of the Chinese Academy of Sciences reveal that the composition of the Moon's surface on the South Pole-Aitken Basin is somewhat different from what they were expecting.
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One theory of the nucleus says that the moon is not as cold and dead as today. Instead, he most likely started as gigantic, molten marble, full of magma oceans. These oceans gradually cooled by absorbing heavy minerals such as green olivine or low calcium pyroxene into the lunar mantle. Less dense minerals floated to the summit, thus giving the moon a number of obvious geological layers like space bow. The bark, the upper layer, consists mainly of aluminum silicate or plagioclase.
"Understanding the composition of the lunar mantle is critical for testing whether there was an ocean of magma as it was supposed to," said co-author Li Chonglai in a press release. "It also contributes to our understanding of the thermal and magmatic evolution of the moon."
Understanding the composition of the mantle gives planetary scientists a better idea of how internal parts of other planetary bodies, including the Earth, can develop.
The landing gear Chang 4 first landed in the Crater von Karman, lying on the floor of the South Pole-Aitken Basin, in January. Then the passenger sent a rover, Yutu-2, equipped with a spectrometer measuring the reflected light. By studying the light reflected from the surface when the rover rolled along the background of Karman, scientists were able to detect minerals and determine their chemical composition. Instead of seeing plenty of plagioclase, Rover found the dominance of olivine and pyroxene. . Rover explores a nearly 72-kilometer Finsen crater, so minerals could be sprayed on the surface when creating this crater.
Although the mission of NASA Apollo drove people to the moon, and Russia made concerted efforts to obtain lunar samples. In the 1970s, there was no study of the moon mantle. This makes the mission of China particularly important, but due to the complexity of the study of minerals on a planetary body in hundreds of thousands of kilometers, further work will be needed in order to gather a more complete understanding of the composition of the mantle.