                                     Planet orbiting a double star
                                    U. Backhaus, AiR Essen, Germany

This program simulates an eclipsing system of a white dwarf and a much less bright second star.
A planet is orbiting around the center of mass of this system. The resulting brightness of the
system and the planet's influence on the period of the eclipsing are plotted.

Several parameters of the System can be choosen:
   - the ratio of the radii,
   - the ratio of masses,
   - the ratio of flux densities,
   - the angle of inclination and
   - the time step.