A New Theory of Lunar Magnetism

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Science  11 May 1973:
Vol. 180, Issue 4086, pp. 636-638
DOI: 10.1126/science.180.4086.636


In the hypothesis advanced here it is supposed that the field, in which rocks at the lunar surface acquired the remanent magnetization found through the Apollo project, arose from permanent magnetization of the deep interior of the moon. This theory involves the assumption that the moon, apart from a surface shell, accreted cold and remained below the Curie point of iron until sometime later than 3 x 109 years ago. The magnetization was acquired as the moon formed in a gas sphere in the strong magnetic field of the early sun.