By Richard E. Wainerdi (Eds.)
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C H 4 , other light hydrocarbons and H N 3 . Any light hydrocarbons such as methane, as well as other light volatile compounds such as ammonia, will also be lost relatively rapidly since even as molecules their velocity ranges are too high for retention, and, furthermore, they are all subject to appreciable photodissociation. Detecting them in an uncontaminated atmosphere would tend to indicate relatively high current production rates. 9. Heavy hydrocarbons. There are some perhaps not widely accepted theories which postulate the presence of high-molecular-weight hydrocarbons on the lunar surface.
C2), using a small telescope equipped with filters, that the "black spots", first observed by R. W. Wood in 1910 when he viewed the Moon through a filter that absorbed 3100 Â light, are real. Green's photos showed such spots near Aristarchus—in which crater astronomers had previously reported observing a red glow which could have been caused by volcanic activity. Green interprets the 3100 Â absorption as indicating the presence of native sulfur in these areas. On Earth, wherever *A method of analyzing these data by computer has been devised through which it is hoped the error limits can be reduced substantially, making it perhaps possible to exclude additional rock types.
Basaltic and granitic rocks (including acidic ash falls or flows), and/or chondritic meteorites. However, it should be borne in mind that in fact almost any kind of known igneous rock or meteorite might be encountered, and that rocks with no terrestrial equivalents could conceivably occur. It is quite possible, too, that unless placement of the probe on the planet (or Moon) is observed—and perhaps controlled —the sample analyzed could (with small probability, of course) come from an outcrop which is quite atypical of the average surface material.
Analytical Chemistry in Space by Richard E. Wainerdi (Eds.)