Density of the Lunar Atmosphere

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Science  27 May 1960:
Vol. 131, Issue 3413, pp. 1606
DOI: 10.1126/science.131.3413.1606


The minimum possible density of the lunar atmosphere at the surface is shown to be essentially the value for the interplanetary medium. This value, when combined with the observed maximum, places the particle density between 103 and 106 per cubic centimeter, while the electron density must be about 103 to 104 per cubic centimeter. These results are markedly different from those recently obtained by Firsoff.