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Astronomy

Deposition of Water Ice in Permanently Shadowed Lunar Craters

Quick fact

Data from lunar orbiters suggest that permanently shadowed polar craters may store billions of tons of water ice, some of which might have been deposited over billions of years.

Why this is interesting

Imagine a place on the Moon that has never seen sunlight. Yet, hidden in its shadows, water ice may be silently accumulating. How does that happen?