日本宇宙航空开发机构(JAXA)周五(22日)表示,其探测器“隼鸟2号”成功降落在距离地球3.4亿公里的小行星“龙宫”。隼鸟2号会采集岩石样本,或有助人类了解太阳系的起源。
隼鸟2号于2014年12月升空,经历逾4年时间终于成功降落。从周四下午开始,隼鸟2号从龙宫上空20公里的位置出发,以每秒约90厘米的速度下降,当降至距离地表不到5公里后再放慢速度,小心接近地面。
由于龙宫的表面地形险峻,散布着很多岩石,为避免撞上岩石导致机体损伤,隼鸟2号按照规定步骤,先找到事先落下的标记球,在空中8.5米处一度停下等待,待准备完毕后才开始降落。按照计划,隼鸟2号会向龙宫表面发射一枚“子弹”,并收集所激起的物质,稍后带回地球研究。#
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