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.
If you are new to Stellarium, go to www.stellarium.org for loads of additional information.
Please refer to the User Guide, Getting Started section.
See instructions to building Stellarium from source code.
See the full credit file.
See the contributing guideline.