Molecular gas species in the lunar atmosphere

Details Molecular gas species in the lunar atmosphere Molecular gas species in the lunar atmosphere

Sep 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975moon...14..159h&link_type=abstract

(Lunar Science Institute, Conference on Interactions of the Interplanetary Plasma with the Modern and Ancient Moon, Lake Geneva,

Computer Science

14

Ammonia, Apollo 17 Flight, Atmospheric Composition, Carbon Dioxide, Lunar Atmosphere, Methane, Sudden Enhancement Of Atmospherics, Abundance, Apollo Lunar Surface Experiments Package, Gas Composition, Graphs (Charts), Mass Spectroscopy, Molecular Gases, Solar Flux, Solar Wind

Scientific paper

Evidence is presented from the data obtained by the Apollo 17 lunar mass spectrometer which indicates the presence of methane and perhaps very small amounts of ammonia and carbon dioxide in the lunar atmosphere. This evidence is based on predawn enhancement of the concentrations of the mass peaks at the parent position for these molecular gas compounds. Methane is shown to be the most abundant molecular gas, although its exceedingly low concentration (1000 mol/cu cm) is slightly less than that of Ar-36. Several reasons are considered for the very low concentration of methane in the lunar atmosphere.

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