Where Was the Moon Formed?

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Science  23 Oct 1970:
Vol. 170, Issue 3956, pp. 438-439
DOI: 10.1126/science.170.3956.438


Volatile substances have a low abundance in lunar surface rocks as compared to terrestrial rocks. If this depletion is explained in terms of a late accretion of volatile materials from a solar nebula with falling temperature, then the conclusion can be drawn that the moon accumulated not in earth orbit but as a separate planet, and that it was later captured by the earth.

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