Southern Hemisphere Neutron Map

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by NASA/Jet Propulsion Laboratory/University of Arizona

NASA Image Library · 公有领域（Public Domain）

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NASA Mars Odyssey spacecraft produced this high-energy neutron detector map of neutrons in Mars southern hemisphere. The blue region around the south pole indicates a high content of hydrogen in the upper 2 to 3 meters 7 to 10 feet of the surface.

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