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Celestia Europe Io Jupiter.jpg
A picture of Jupiter, Europa and Io taken in Celestia
Developer(s) Chris Laurel, Celestia developers
Initial release 2001
Stable release
1.6.1 / June 7, 2011
Repository sourceforge.net/p/celestia/code/HEAD/tree/
Operating system Cross-platform
Size 22.69 MB (Windows)
26.13 MB (Mac OS X)
14.57 MB (Linux)
49.4 MB (Source code)
(all compressed)
Type Educational software
License GNU General Public License
Website celestiaproject.net

Celestia is a free 3D astronomy program for Windows, Mac OS X, and Linux. It is created by Chris Laurel and licensed under the GNU.

The program is based on the Hipparcos Catalogue (120.000 Stars) and allows users to display objects from artificial satellites to entire galaxies in three dimensions in OpenGL. Different from other planetarium software, the user is free to travel in the universe.

NASA and ESA have used Celestia, but it is not to be confused with Celestia 2000, ESA's own program.