This is an online user guide for Stellarium. The software is easy to use, but I will try to help you get the most out of it. The user guide is applicable to release 0.11.3. Hopefully it will be updated as new features are introduced in new releases. User guide for release 0.10.2 is available online at the Stellarium wiki page and as PDF document that can be downloaded from Stellarium home page. Some of the details there are no longer applicable.