格林第一季

New advances in lunar soil research offer scientific evidence to unravel mystery of moon’s 'two faces'_我的网站

一 |     9月29日，人民广场热闹非凡，我市首届农民庆丰收暨农业特色产业推介招商活动盛大启幕。

二 | 作为此次活动的重要组成部分，特色农产品丰收集市也精彩亮相。         　　丰收集市上，70 余家农业特色产业经营主体带来了种类丰富的优质特色农产品。食用菌鲜嫩饱满、中药材散发着独特的药香、山野菜带着大自然的清新、粮油产品品质上乘、水果色泽诱人。

三 |     

    Lunar soil Photo: IC
Chinese scientists have made new progress in the study of lunar soil samples returned by the Chang'e-6 mission, providing fresh evidence to the striking differences between the moon's near and far sides, which have long puzzled scientists.
Because the moon is tidally locked to Earth, its rotation period matches its orbital period, meaning the same side always faces Earth. The moon's near side features vast dark basaltic plains known as lunar maria, while its far side is dominated by bright highlands with far fewer maria, creating a striking contrast between the two sides. Why does the moon have such "two faces"?
Scientists studying the moon's early formation and evolution have long used the lunar magma ocean model as a basic framework. Under the model, the chemical and isotopic characteristics of different types of lunar magma can be explained by the mixing of different components in varying proportions after the magma ocean cooled, Guangming Daily reported on Saturday. 
However, previous lunar samples were collected only from the moon's near side, while significant differences exist between the near and far sides in their topography, composition and internal structure.
Against this backdrop, the research team from Institute of Geology from Chinese Academy of Geologist Sciences studied feldspathic impact-melt rocks in lunar soil samples returned by the Chang'e-6 mission. Using China's first independently developed ion probe system, researchers conducted a comprehensive analysis to test the lunar magma ocean model and examine how large impacts reshaped reservoirs in the lunar crust and mantle.
Through high-precision analyses, the team identified key clues to the moon's evolutionary history, suggesting that the stark differences between its near and far sides may be linked to the ancient giant impact that formed the South Pole-Aitken Basin.
The study found that the massive impact continued to profoundly reshape the lunar crust and upper mantle after the lunar magma ocean had solidified, fundamentally altering the material composition of parts of the moon's far side.
The findings add to the traditional lunar magma ocean model, suggesting that the formation and preservation of the moon's crustal and mantle reservoirs may have varied significantly from region to region and cannot be fully explained by a single, uniform model of primordial magma-ocean differentiation.
The research provides new scientific evidence for understanding the differences between the moon's near and far sides, while offering fresh insights into the moon's complex evolutionary history, according to Guangming Daily. 
Global Times
。抚顺县黑木耳、清原寒富苹果、新宾大米等辽宁省知名、百强名牌农产品以及煎饼、葡萄酒、即食山野菜和肉制品等抚顺知名特色农产品吸引着众多市民驻足品鉴。人们穿梭在各个展位之间，一边品尝着美味的农产品，一边感受着丰收的喜悦，脸上洋溢着灿烂的笑容。         　　抚顺市民说：“这个活动特别好，让我们在家门口就能买到这么多优质的农产品。也希望通过这个活动，让更多的外地人了解我们抚顺的农产品，喜欢我们抚顺的特产。”          　　参展商说：“通过这个活动，我们不仅能展示和销售自己的产品，还能与其他经营主体交流经验，拓展市场，对我们的发展非常有帮助。”          　　此次活动为农民搭建了一个展示丰收成果、交流种植经验、销售特色农产品的平台，进一步提升了抚顺农业特色产业品牌影响力，为推动我市农业特色产业的发展、促进乡村振兴注入了新的活力。                    责任编辑：李丹。

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Published on:11:03:47