What is Stellarium for Java?
Stellarium is an open source desktop planetarium for Java platforms, including Linux/Unix, Windows and MacOSX. 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. The original Stellarium project was started by Fabien Chéreau during the summer of 2001 and uses Sourceforge intensively. Stellarium for Java (S4J) is the Java version of Stellarium. Access the Sourceforge project page here.