Elemental Composition
Elements known to be present on the lunar surface include, among others, oxygen (O), silicon (Si), iron (Fe), magnesium (Mg), calcium (Ca), aluminium (Al), manganese (Mn) and titanium (Ti). Among the more abundant are oxygen, iron and silicon. The oxygen content is estimated at 45%. Carbon (C) and nitrogen (N) appear to be present only in trace quantities from deposition by solar wind.
Neutron spectrometry data from the Lunar Prospector indicate the presence of hydrogen (H) concentrated at the poles.
Relative Concentration (in weight %) of Various Elements on Lunar Highlands, Lunar Lowlands, and EarthRead more about this topic: Lunar Surface
Famous quotes containing the words elemental and/or composition:
“For the elemental creatures go
About my table to and fro,
That hurry from unmeasured mind
To rant and rage in flood and wind....
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—William Butler Yeats (1865–1939)
“I live in the angle of a leaden wall, into whose composition was poured a little alloy of bell-metal. Often, in the repose of my mid-day, there reaches my ears a confused tintinnabulum from without. It is the noise of my contemporaries.”
—Henry David Thoreau (1817–1862)