Stellarium is an open source desktop planetarium. It renders the skies in realtime using OpenGL, which means the skies will look exactly like what you see with your eyes, binoculars, or a small telescope. Stellarium is very simple to use, which is one of its biggest advantages: it can easily be used by beginners.
Control a ball of grey goo with the ability to eat anything smaller than itself.
Powerful planetarium program has many features for both the beginner and advanced astronomer.
Turn your computer into an interactive planetarium!
Free, full featured treatment planning software
Move freely through the cosmos with a 3D astronomy visualization tool.