File:MESSENGER - NS.jpg

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Summary

DescriptionMESSENGER - NS.jpg	English: "NS maps variations in the fast, thermal, and epithermal neutrons Mercury’s surface emits when struck by cosmic rays. “Fast” neutrons shoot directly into space; others collide with neighboring atoms in the crust before escaping. If a neutron collides with a light atom (like hydrogen), it will lose energy and be detected as a slow (or thermal) neutron. Scientists can look at the ratio of thermal to epithermal (slightly faster) neutrons across Mercury’s surface to estimate the amount of hydrogen – possibly locked up in water molecules – and other elements."
Source	http://messenger.jhuapl.edu/instruments/GRNS.html
Author	NASA / JHU/APL

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	22:35, 25 January 2011		357 × 186 (19 KB)	Xession	{{Information \|Description ={{en\|1="NS maps variations in the fast, thermal, and epithermal neutrons Mercury’s surface emits when struck by cosmic rays. “Fast” neutrons shoot directly into space; others collide with neighboring atoms in the crust

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