Orbital motion

The restless universe is considered along with coordinate and time-keeping systems, taking into account the solar system, stellar motions, clusters of galaxies, the position on the earth's surface, the horizontal system, the equatorial system, the ecliptic system, elements of the orbit in space, rectangular coordinate systems, orbital plane coordinate systems, the transformation of systems, the galactic coordinate system, and questions of time measurement. Other topics discussed are related to the reduction of observational data, the two-body problem, the many-body problem, general perturbations, special perturbations, the stability and evolution of the solar system, lunar theory, artificial satellites, rocket dynamics and transfer orbits, interplanetary and lunar trajectories, orbit determination and interplanetary navigation, and binary and other few-body systems. Many-body stellar systems are also examined, giving attention to the sphere of influence, the binary encounter, the cumulative effect of small encounters, the fundamental theorems of stellar dynamics, and some special cases for a stellar system in a steady state.