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Celestia Europe Io Jupiter.jpg
Europa, Io, and Jupiter in Celestia.
Original author(s)Chris Laurel
Developer(s)Chris Laurel, Celestia Development Team
Initial release26 February 2001; 19 years ago (2001-02-26)[1]
Stable release1.6.1 / 10 June 2011; 9 years ago (2011-06-10)[2]
Preview release1.6.2-beta2 / 20 February 2020; 11 months ago (2020-02-20)[3]
Written inC++
Operating systemAmigaOS 4[source?], BSD, Linux, macOS and Microsoft Windows
SizeLinux: 27.7 MB
AmigaOS 4: 44.4 MB
macOS: 38.7 MB
Windows: 32.8 MB
Source code: 52.6 MB[4]
Available in28 languages[5]
TypeEducational software
LicenseGNU General Public License

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

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[6].

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