Freeware: Planetarium

Asynx Planetarium 2.61Asynx Planetarium is a easy to use Planetarium program and solar system simulator. It can display the night sky from any location on earth and between the year 1760 and 9999. Perfect for students, kids and astronomy beginners. Try it, it's free !

Celestia 1.3.0Celestia is a free real-time space simulation that lets you experience our universe in three dimensions. Unlike most Planetarium software, Celestia doesn't confine you to the surface of the Earth.

Planetarium Theme v1.0is a desktop theme featuring images of planets, stars, and galactic phenomena. It includes wallpaper, icons, animated cursors, and WAV sounds.