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| | Moon - Wikipedia, the free encyclopedia |
 | | The lunar crust is composed of a variety of primary elements, including uranium, thorium, potassium, oxygen, silicon, magnesium, iron, titanium, calcium, aluminium and hydrogen, as determined by spectroscopy. |
 | | Lunar Prospector results, however, indicate the presence of hydrogen in the permanently shadowed regions, which could be in the form of water ice. |
 | | The neutron spectrometer on Lunar Prospector confirmed the presence of excess hydrogen at the lunar poles, which some have speculated to be due to the presence of water. |
| en.wikipedia.org /wiki/Moon (4754 words) |
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