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1 Introduction
Pages 7-9

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From page 7...
... The lunar interior retains a record of the initial stages of planetary evolution. Its crust has never been altered by plate tectonics, which continually recycle Earth's crust; or by planetwide volcanism, which resurfaced Venus only half a billion years ago; or by the action of wind and water, which have transformed the surfaces of both Earth and Mars.
From page 8...
... The lunar atmosphere, though tenuous, is the nearest example of a surface boundary exosphere, the most common type of satellite atmosphere FIGURE 1.1 Lunar science encompasses four overarching themes of solar system exploration.
From page 9...
... These products have scientific value and may well have practical value. The frigid lunar poles contain volatiles, perhaps abundant, that may provide information to characterize the sources of volatiles in the early solar system.

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