太阳系十大魅力图片:木卫一有张“比萨脸”(2)
登月宇航员采集月球土壤样本
2、登月宇航员采集月球土壤样本
月球距离地球24万英里,如图所示,1972年美国宇航局“阿波罗16号”宇宙飞船宇航员约翰-杨(John Young)正在采集月球土壤样本,从而证实了月球表面的高地主要是由于陨星碰撞造成的,而并非是火山活动造成的。
阿波罗16号返回地球时携带的731个月球土壤样本显示,主要是由角砾岩构成,或者是由碎片熔化后的混合物质,或许这是由于陨星碰撞月球产生热量和压力所形成的。
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