Accession Number : AD0611373

Title :   EFFECTS OF THERMAL EXPANSION ON THE MOMENTS OF INERTIA OF THE MOON,

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

Personal Author(s) : Kopal,Zdenek

Report Date : JAN 1965

Pagination or Media Count : 31

Abstract : Thermal conduction problem for a homogeneous sphere illuminated by a parallel beam of light is solved in terms of Fourier-Bessel expansions; and the resulting nonsymmetric deformation due to thermal expansion is established on the assumption that the (self-gravitating) sphere behaves like an elastic solid. The moments of inertia about the principal axes of so deformed a body are then computed for a configuration approximating in physical properties the lunar globe as deformed by secular effects of insolation; and it is shown that the ratio of the differences of the momenta (C-A)/B which can arise from this cause is much too small to account for its value deduced from the librations. (Author)

Descriptors :   (*MOON, MOMENT OF INERTIA), (*MOMENT OF INERTIA, MOON), (*THERMAL EXPANSION, MOON), SOLAR RADIATION, HEAT TRANSFER, FOURIER ANALYSIS, DEFORMATION, DIFFERENTIAL EQUATIONS, ELASTIC PROPERTIES, BOUNDARY VALUE PROBLEMS

Distribution Statement : APPROVED FOR PUBLIC RELEASE