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Published online by Cambridge University Press: 07 February 2017
Since the days of Cassini (1693), study of the position of the lunar axis relative to an inertial system of reference has been based on the assumption that “the inclination of the Moon's equator to the plane of the ecliptic is constant”. And, although the actual value of that inclination has been subject to continuous changes and modifications, reduced from the originally suggested 4½° to 1°32′4″ (Koziel, 1967), no sufficient attention has been paid to the fact that, as the lunar globe moves within the field of varying external forces, the inclination of its axis cannot remain constant.