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[Centaur]

Here's a link to an MSNBC article regarding the Hubble's discovery of material in the Moon's soil that might be useful to astronauts .

www.msnbc.msn.com/id/9752269/

[Maddad]

In a way it makes sense for the lunar rocks to be rich in oxygen content. It existed way back when the Earth and Moon first formed, but became chemically bound to other rocks because oxygen is so reactive. On Earth we have 20% in the atmosphere only because biological processes counter the continuing tendency of oxygen to bind with rocks. Since the Moon doesn't have biological activity like Earth does, all it's oxygen should be lying on the ground.