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数百个不明物体击穿土星外光环
2012-04-26 09:38:11
来源：现代快报
不明物体让土星光环出现“伤疤”。
据英国《每日邮报》24日报道，美国家航空航天局(NASA)公布的一组照片显示，土星的一道光环被数百个不明物体击穿，留下了一道道“伤疤”。这组照片来自NASA土星探测器“卡西尼”号。照片显示，不明物体撞向土星外层的F光环，并从中穿过，给F光环留下了明显的“伤疤”。
NASA分析称，这些不明物体很可能是一些“雪球”，最大的直径达到约800米，来自土星卫星土卫十六等天体。
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