Pocket Stars PC

Based on data from the Jet Propulsion Laboratory and the US Naval Observatory, Pocket Stars offers extremely accurate positional information for solar system bodies, stars, and Messier and Caldwell objects.
Targeting astronomers, celestial navigators, and the casual observer, Pocket Stars offers numerous tools for visualization, identification, animation, and computation of position based on celestial observations using a sextant. Reduction from sextant altitude to observed altitude for any of the 9110 stars, nine planets, and sun and moon is quick and easy.
Pocket Stars lets you visualize the heavens from two different vantages. First is a traditional starchart view drawn from an observers location anywhere on the surface of the earth. This vantage is called "2D Star Chart". The other vantage lets you zoom through the solar system, approaching the sun from any angle. This vantage is called "3D Orrery".Limitations in the unregistered version15 days trial