More Software Like 2011 Nautical Almanac 2011

2011 Nautical Almanac

Complete 2011 Nautical Almanac in pdf format. Includes monthly star charts with the planet's positions.

Aciqra

Aciqra is a free and open source virtual planetarium and sky mapping program which tracks celestial bodies including planets, deep sky objects and stars.

GrandTour

Accurate, flexible wireframe simulator for the Voyager and Giotto space missions, with animation capability. Developed at JPL for science/navigation, and filmed by the BBC/NOVA. Conveniently runs from any Windows/DOS.