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How do scientists find water ice on the Moon or Mercury?

Quick Answer

They use radar, neutron measurements, and spacecraft imaging to detect ice in permanently shadowed areas.

The Full Story

Although the Moon and Mercury are very close to the Sun, some deep craters at their poles never receive direct sunlight. These permanently shadowed regions can stay cold enough for water ice to survive for long periods. Instruments on orbiters have found signatures of hydrogen, and radar reflections can suggest ice-rich deposits. On the Moon, missions such as LCROSS and later lunar orbiters strengthened the evidence for water ice in polar craters.

Key Facts

1.Permanently shadowed polar craters can preserve ice
2.LCROSS impacted the Moon in 2009
3.Mercury also has polar ice deposits

YouTube Angle

Suggested video title for this topic:

"Ice exists in some of the darkest, coldest places near the Sun."

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