Most Of Moon’s Water Likely Remains Chemically Bound In Its Deep Interior

Geologist-Astronaut Harrison H. Schmitt is photographed standing next to a huge, split boulder at Station 6 on the sloping base of North Massif during the third Apollo 17 extravehicular activity (EVA-3) at the Taurus-Littrow landing site. Credit: NASA

Aside from an unknown quantity of water in the Moon’s permanently shaded polar craters, the lion’s share of what water the Moon may have is likely chemically bound in its deep interior.

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