Celestia

Real-time 3D visualization of space

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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.