About 170 grams of water in 1 ton month!New discoveries brought new discoveries on the surface layer of Chang'e 5

At the intersection news, recently, the Research Team of the Institute of Geochemical of the Chinese Academy of Sciences conducted research on the Chang'e 5 Monthly Royal Sample and found that there is a large amount of sun wind cause water in the surface layer of Chang'e 5. At least 170ppm (PPM is a million -point concentration). Where does the water on the moon come from? What form exists? A reporter from Xinhua Daily · Jiaojiao Point interviewed Zhang Aiyi, an expert in Jiangsu Geological Society and a professor at Nanjing University, trying to explore the "secrets" of more water of the moon.

Zhang Xuan/Photo

"The water found in the moon in the moon is the cause of the sun. In short, it is the water blowing from the sun wind." Zhang Aiyi told reporters that the solar wind is mainly composed of hydrogen and 氦, and it is constantly blowing to the surface of the moon. There is no atmosphere of the moon and there is no way to prevent the bombardment of the solar wind particles. Therefore, the hydrogen and crickets of the solar wind will be injected into the moon soil minerals on the surface of the moon, but the inching depth is very limited, mainly on the surface of the mineral. "If Yueyang forms glass due to a local meteorite impact, the water on the surface of these minerals will be transferred to the glass or partially lost."

In addition to the cause of the sun on the moon, there are also water brought by the moon's own water, asteroid or comet. "Although some water may be residial when the moon is formed, it is slowly enriched in the long history of the moon." Zhang Aiyi said, "For example, the moon's Xuanwu rock (the melt formed by the melting of the moon curtain to the rock of the moon surface) One of the minerals called limestone can contain structured water existing in the form of hydrogen and oxygen roots that reach thousands of PPM. "And when the water -rich asteroids or comets hit the moon surface, although a large amount of water evaporates when impacting when impact There are still some water deeper into the soil.

The monthly water contains about 170 grams. In contrast, the water content of the sand in a ton of the desert on the earth can reach more than ten kilograms. Why does the water on the moon disappear so fast? Most of the water in the moon is contributed by the solar wind, and most of the water in the moon rock is available before magma. "The impact of meteorites and solar radiation can cause the loss of water in the moon." Zhang Aiyi believes that on the one hand, the meteorite impact will bring a short temperature, which will cause the impact pit and some nearby moon to lose water. On the other hand, although the temperature on the surface of the moon is not particularly high during the day, because the moon surface is close to the vacuum, the temperature of the solar radiation may cause the water release and migration of the water surface of the moon. "Avoid the radiation of the sun, it can help the water on the moon without loss."

Moon meter minerals are important water storage "warehouses". Will there be water in the mantle that month? "The source area of ​​Chang'e 5 Xuanwu Rocky Moon Mantra, the water content of each gram of rocks does not exceed 5 micrograms." The Moon Sea Xuanwu Rock in Chang'e 5 Moon Sample is one of the most "young" basalt of the moon. The source area of ​​late magma activity is not rich in radioactive elements. "Chang'e -5 landing area is not attributed to the rich radioactive fever elements in the source area, nor because the source area is rich in water, which puts forward new goals for future scientific research and lunar exploration."

In the science fiction film "Mars Rescue", astronauts planted potatoes in Mars. Can the water found on the moon be used to grow vegetables? "Planting vegetables requires liquid water, but there is no evidence that there is currently clear evidence that there is liquid water on the surface of the moon." Zhang Aiyi introduced that currently there is the structure water in the minerals. It is not easy to be absorbed by plants. "Of course, from a scientific perspective, the water found in the moon can be released through technical means, but the cost is relatively high. Previously, the predecessor had proposed that there would be water ice in the shadow area of ​​the moon. It is possible to plant dishes to plant vegetables. "

Xinhua Daily · Jiaojiao Reporter Zhang Xuanjie Judge Cheng Xiaolin

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