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| | [2.0] The Exploration Of The Moon (1) (Site not responding. Last check: 2007-11-02) |
 | | However, the Moon's orbit has a degree of eccentricity, ranging from 356,410 kilometers to 406,697 kilometers, exposing the east and west edges of the lunar farside during different parts of the Moon's orbit. |
 | | The composition of the Moon is broadly similar to that of the Earth, but it is geologically inactive, with a small plastic core maybe 680 kilometers across, a deep solid mantle, and a relatively thin crust. |
 | | Early theories of the formation of the Moon suggested a number of scenarios: that it formed elsewhere and was captured by the Earth; that it and the Earth were formed together; and that it was split off from the Earth in the distant past. |
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