Reports

Lunar Surface Material: Spacecraft Measurements of Density and Strength

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Science  27 Jun 1969:
Vol. 164, Issue 3887, pp. 1514-1516
DOI: 10.1126/science.164.3887.1514

Abstract

The relation of the density of the lunar surface layer to depth is probably best determined from spacecraft measurements of the bearing capacity as a function of depth. A comparison of these values with laboratory measurements of the bearing capacity of low-cohesion particulate materials as a function of the percentage of solid indicates that the bulk density at the lunar surface is about 1.1 grams per cubic centimeter and that it increases nearly linearly to about 1.6 grams per cubic centimeter at a depth of 5 centimeters.