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Science 1 March 1968:
Vol. 159. no. 3818, p. 973
DOI: 10.1126/science.159.3818.973
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Articles

Density of the Lunar Surface

Malcolm J. Campbell 1, Juris Ulrichs 1, and T. Gold 1

1 Center for Radiophysics and Space Research, Cornell University, Ithaca, New York 14850

The evidence that the lunar soil is basaltic permits a closer estimate of its density from the radiothermal and radar data. The mean density at the surface is 0.6 ± 0.2 gram per cubic centimeter, increasing to 1.0 gram per cubic centimeter at a depth of a few centimeters; still higher densities at depths of up to meters are implied by the radar observations.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)