Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1971
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971natur.234..402j&link_type=abstract
Nature, Volume 234, Issue 5329, pp. 402-403 (1971).
Astronomy and Astrophysics
Astronomy
Scientific paper
THE tendency of lunar soil to break into clods when disturbed was recognized from Surveyor 1 photographs1,2. Pictures of disturbances produced in bearing tests with the Surveyor 3 soil mechanics surface sampler3 suggested to some observers that the soil layer in Oceanus Procellarum tends to crack into thin flat ``tiles'' (Figs, 1a and 2a) and, therefore, that it consists of a thin, rather rigid crust over a softer substrate. Pictures of areas disturbed by the Apollo 11 closeup camera in Mare Tranquillitatis (Fig. 3a) and by the Apollo 12 lunar module descent engine in Oceanus Procellarum conveyed a similar impression4,5. None of the authors of these works were misled, and, indeed, they warned against this interpretation3-5. Nevertheless, photographs made by the Apollo 12 astronauts of the areas disturbed by Surveyor 3 help to clarify the matter.
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