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?