Celestia

Real-time 3D visualization of space

Download Celestia

3D Space Simulator

Celestia simulates many different types of celestial objects. From planets and moons to star clusters and galaxies, you can visit every object in the expandable database and view it from any point in space and time. The position and movement of solar system objects is calculated accurately in real time at any rate desired.

Interactive Planetarium

Celestia serves as a planetarium — for an observer on any celestial object. You can easily navigate to any world and land on its surface. Celestia shows accurate positions of solar system objects in the sky, with labels and supporting features you can toggle on and off.

Expandable Content

Celestia's catalogues can be easily expanded with add-ons containing new objects like comets or stars, high-resolution textures, 3D models for asteroids and spacecraft on precise trajectories, and even fictional objects from well-known sci-fi franchises. Want to promote your artwork? Submit your add-on here.

Privacy & License

Celestia only collects data for analytic and diagnostic purposes. See the privacy policy. Celestia is licensed under the GNU General Public License.

Development & Credits

Celestia is open source. The source code is available at celestiamobile and CelestiaProject. See the build guide and third party libraries. Full list of authors and translators.

Contacts

For the original Celestia project: forum or GitHub discussions. For the frontends or website: use in-app feedback, GitHub issues, or e-mail.