Lunar Magnetic Field: Permanent and Induced Dipole Moments

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Science  29 Nov 1974:
Vol. 186, Issue 4166, pp. 825-826
DOI: 10.1126/science.186.4166.825


Apollo 15 subsatellite magnetic field observations have been used to measure both the permanent and the induced lunar dipole moments. Although only an upper limit of 1.3 x 1018 gauss-cubic centimeters has been determined for the permanent dipole moment in the orbital plane, there is a significant induced dipole moment which opposes the applied field, indicating the existence of a weak lunar ionosphere.

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