阿波罗12号月球模块撞击:实验室模拟和可能的下射程弹道效应.
Science (New York, N.Y.)
|August 28, 1970
概括
塑料颗粒对沙子目标的冲击模仿了阿波罗12号月球模块 (LM) 的冲击,造成浅坑. 碎片从远处再次撞击,但这种弹道雨并不能解释异常的地震信号.
科学领域:
- 行星科学 行星科学
- 撞击石坑的动力学
- 地震学 地震学
背景情况:
- 阿波罗12号任务在月球模块 (LM) 撞击时经历了一个异常的地震信号.
- 了解撞击动态对于解释行星表面特征和地震数据至关重要.
研究的目的:
- 用塑料颗粒对沙子目标模拟月球模块撞击条件.
- 为了研究火山口的形成和喷射模式.
- 评估弹道雨对异常地震信号的贡献.
主要方法:
- 塑料颗粒被发射到沙子目标上,模拟阿波罗12号LM撞击条件 (发射角度4°,速度1.68公里/秒).
- 形成的石坑被分析为形态 (浅圆或双层).
- 研究了射出模式和下行回击影响.
主要成果:
- 形成了浅浅的圆或双重石坑,类似于月球石坑.
- 分析表明,LM碎片和火山口喷射物跳过并远远撞击.
- 观察到的弹道雨并不能完全解释异常的地震信号.
结论:
- 撞击实验可以复制月球石坑的特征.
- 回击碎片 (弹道雨) 是这种冲击的结果.
- 来自阿波罗12号LM撞击的异常地震信号需要进一步的解释,而不仅仅是弹道雨.
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