Summary: Stellarium is a free GPL software which renders realistic skies in real time with OpenGL. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope. Stellarium is also used in real planetariums.
Summary: Stellarium is a free open source planetarium for your computer. This older version is the last version based on qt4 which may run, or run more efficiently, on older or less powerful systems.
Summary: 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.