Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope.
It is being used in planetarium projectors. Just set your coordinates and go. view screenshots
Sourceforge
Sourceforge is the central website where we collaborate on Stellarium, and where you can be heard too!
clipped from: www.stellarium.org 