【實用教育app】Kepler Motion|最夯免費app-綠色工廠好玩App

Kepler Motion solves planer Kepler motions of planets rotating around the Sun. Planet's trajectories are integrated by using second order leapfrog method. Initially all planets are lined up with different radial distances in a same radial direction with zero eccentricities. We can arbitrary change initial planet's radial distances from the Sun and their masses. In addition, we can add a gas drag on each planets.