Evolution of Motion of a Double Planet in the Gravitational Field of a Massive Viscoelastic Body / *Shatina L.S.* // Vestnik Moskovskogo Universiteta. Seriya 1. Matematika. Mekhanika. 2011. № 6. P. 32-37
[Moscow Univ. Mech. Bulletin. Vol. 72, N 2, 2017. P. 0].

The motion of a double planet in the gravitational force field of a massive planet modeled by a viscoelastic body is studied. The double planet is modeled by a viscoelastic body and a material point. These viscoelastic bodies are homogeneous, isotropic and, in their natural undeformed state, occupy spherical regions in the three-dimensional Euclidean space. The problem is solved in the framework of a linear model in the theory of viscoelasticity. The motion separation method and the averaging method are applied to derive an approximate system of equations describing the evolution of translational-rotational motion for the mechanical system under study. The Earth-Moon system is considered in the gravitational field of the Sun as an example of a double planet.

*Key words*:
double planet, viscoelastic body, evolution of motion.