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....
”
—William Butler Yeats (1865–1939)
“Boswell, when he speaks of his Life of Johnson, calls it my magnum opus, but it may more properly be called his opera, for it is truly a composition founded on a true story, in which there is a hero with a number of subordinate characters, and an alternate succession of recitative and airs of various tone and effect, all however in delightful animation.”
—James Boswell (1740–1795)