By Richard E. Wainerdi (Eds.)
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C5). Possibly (but improbably unless the solar wind does not in fact reach the Moon's surface), heavier gases residual from any primitive atmosphere which may have existed at one time, and originally-contained gases which have leaked out from the below-surface regions of the Moon, and which may perhaps still be leaking out through diffusion and/or volcanism, will also be present. Sputtering due to proton bombardment by the solar wind, and vaporization of surface material from meteorite impact, may also contribute substantially to its atmosphere, especially in the case of oxygen, wherever surface soils and rocks are composed of oxygen-compounds like terrestrial igneous rock or stony meteorites in composition.
The geochemistry group recommended, for example, that two mass spectrometers be taken along on the proposed Mission AAP-2 to Copernicus, one to be a hand-carried exploration tool and the other to be emplaced for a long-term experiment with a life of at least 1 year. , mentioned above would have, as a means of selecting important samples for return to the Lunar Receiving Laboratory at Houston for terrestrial analysis: 1. To investigate and sample large, recent-impact crater sites. 2. To search for samples of very old lunar rocks.
Are not known in advance; a "traverse" sampling technique will yield valuable information on the rock's texture and grain size as well as on its total composition. In view of the fact that analyses of markedly better quality can be made on Earth using returned samples, and excluding use of the Moon as a laboratory to test unmanned probe apparatus intended for more distant missions, under "field" conditions, for astronaut use, is there still a need for a lunar surface composition analyzer? C4).
Analytical Chemistry in Space by Richard E. Wainerdi (Eds.)