Microsoft Space Simulator

In the grand tradition of Microsoft's Flight Simulator series, Space Simulator takes you on a journey through the Milky Way--and even beyond it, if you're adventurous and have a lot of time to kill. The entire solar system is modeled, along with dozens of other hypothetical systems, and you can also explore comets, nebulae, and other celestial bodies. You can program the flight computer and autopilot to take you on preset journeys, or take the controls yourself. (mobygames.com)