Stellarium is a free, open source planetarium for your computer. Stellarium will show you what the sky really looks like in 3D. You'll be able to view the entire sky and constellations, or you can zoom in and see the stars as if you had a telescope! Use Stellarium to examine start constellations, zoom in on other planets and solar systems, and explore space.

Many planetariums use Stellarium to project their star shows. Download Stellarium today and start exploring the skies from your computer

The first step is to download and install Stellarium. You can download Stellarium free from this site, or download from the project page below.

Once you install Stellarium, you can run it from your Start Menu. Stellarium will show a screen with the entire sky upon loading. From here you can move around, and zoom as close as you want. You can download the free user guide here.

• Full default catalogue of over 600,000 stars! 210 Million stars available.
• Shows all star constellations from 10 different cultures
• Realistic Milky Way
• Realistic planets and moons. Shows atmosphere, sunrise and sunset.
• Extensive time control. Time travel to past or future. Slow down time or speed it up to see the sky move.
• Powerful telescope zoom.

Stellarium is open source software and is made freely availble for personal use. Source code and license information for Stellarium can be found at the Stellarium Project Page.