The earth's moon has been a subject of intrigue to scientists for centuries. The moon is a 4.53 billion year old, rocky object covered by craters, mountains, plains and faults. It is 384,000 kilometers away from the earth and revolves around it approximately every 29 days. (Hartmann & Philips, 1986) It has little more than half the density of the earth and no atmosphere, hydrosphere, or magnetosphere. The moon is proportionally quite large when compared to the size …showed first 75 words of 1771 total…

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