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 …
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showed last 75 words of 1771 total
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