Kepler System Model

Kepler System Model are some Java based simulations specially designed to illustrate Keplers final theory of planetary motion. In this theory the planets orbit in ellipses with Sun at one focus (Keplers First Law). These elliptical orbits are not necessarily all in the same plane. A line from Sun to the planet sweeps out equal areas in equal times (Keplers Second Law). The square a planets period is directly proportional to the cube of the semimajor axis of its elliptical orbit (Keplers Third Law).
The simulation shows Earths orbit around Sun, as well as the orbit of one other planet. The user can choose to show one of the five visible planets (Mercury, Venus, Mars, Jupiter, or Saturn), or a fictitious planet. The top window shows the orbits of the planets around Sun. The view can be changed by clicking and dragging in the window, and a zoom slider is provided to zoom in or out. The bottom window shows the view of Sun and planet against the background stars as seen from Earth.System requirementsJava