ABSTRACT
The aims and problems of flights to the Moon may be different and the trajectories of the flights will be correspondingly different. It appears that flights to the Moon can be realized via different trajectories – elliptic, parabolic, hyperbolic, etc., even if the problems and aims are the same. Presumably, flights with hyperbolic velocity will be realized sometime in the future. The problem connected with the determination of the trajectory of an Earth–Moon flight should be approached as a three-body problem. The Keplerian trajectory during the entire flight is determined primarily by the Earth’s gravitation. Among the aims of astronautics and interplanetary flights there are projects for flybys of the Moon, with or without subsequent return to the Earth. The flight of space apparatus from the Earth to the libration point can be realized in a Hohmann trajectory, an ellipse.
