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Physical librations of the multi-layer Moon
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Update time: 2010-06-17
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Speaker:  
   Prof. Alexander Gusev  (EAO,Kazan university,Russia)

Time:   
   2pm , Tuesday 17 June

Abstract:   
   The modeling of external and internal processes, acting on the rotation of a two- / three - layer Moon, the development of the theory of physical libration of the multi-layer viscoelastic Moon with a purpose to receive the observational effects of rotational modes of two-phase core on the basis of observations planned in the Chang’E and SELENE missions form the important direction in the study of dynamics and interiors of the Moon.

1. Construction of the analytical theory of rotation of the two / three-layer Moon and reception on its basis of physical libration tables for their application at processing precision supervisions; construction of a lunar annual almanac.

2. The analysis of differentiation of a lunar core, evolution of a boundary layer a core - mantle, reconstruction of gravitational and viscous - mechanical interaction of a lunar core and a mantle, resonant dissipation of internal energy, calculation free and forced nutations a lunar core, free fluctuations of lunar core – mantle system.

3. An analyses of resonant interaction of the layers of the Moon with the Earth and the Sun: possible resonance may promote an increasing of amplitudes of those terms in libration's series, which arise due to consideration of the multilayer Moon. Their detection from observations will allow estimating parameters of a lunar core. Its existence or absence is directly connected with a basic problem of an origin and of an evolution of the Earth-Moon system.

4. Reexamination of the role of the resonance in dynamical history of the Earth-Moon system. A special attention will be given to the possible correlation of the resonance phenomena with physical processes, which determine the shape of the Moon, its internal structure and, consequently, its gravity field.

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