Astronomy for the Palm OS. Orrery displays the orbital positions of the nine planets around The Sun. Animate the display to easily visualise elongations of Mercury and Venus, and oppositions of the outer planets. In the information window you call call up detailed information for each planet and get its current distance from the Sun. The Sun Rise Set screen shows you the rise, set and transit times of the sun and the end and start times of the twilights. The Planet Rise Set window let''s you easily plan your observing sessions showing you the planets'' rise, set and transit times and the sun rise and set times and twilights in one graphical display. Orrery works on all b/w, grey scale and colour Palm OS devices with Palm OS 2.0 or greater.