Celestia

Celestia

Celestia Development Team · 2026 · Simulation, Space Sim, Exploration, 3D, Education

PC
Positive93% · 15
This game is free to play. Get it on Steam →

Screenshots

About Celestia

Celestia — real-time 3D visualization of space3D Space Simulator | Celestia lets you explore our universe in three dimensions.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. When used as a planetarium, Celestia shows accurate positions of solar system objects in the sky. You can switch labels and other supporting features on and off with hotkeys, or zoom in and out on an object of interest, for example Jupiter’s system of moons.Expandable Content | Customize Celestia according to your needs.Celestia’s catalogues can be easily expanded. There are many different add-ons available containing new objects like comets or stars, high-resolution textures of Earth and other well mapped solar system bodies, as well as 3D models for asteroids and spacecraft on precise trajectories. Even fictional objects from well-known sci-fi franchises can be found.Music used in trailer: "Brittle Rille" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Jun 23, 2026
First got this in 2003, and it was my first dedicated outlet for worldbuiding my Plutonian Empire universe, though I never really released anything more than Terraformed Pluto and Hadeus, until a few years ago on Celestia Mobile. Glad to see Celestia on Steam. Hopefully our audiences will be a bit bigger now. :)
5 found this helpful
Recommended Jul 1, 2026
so glad that this is finally on steam. it's not exactly SpaceEngine, but we shouldn't really compare these two, because each serves a different purpose. it's pretty light as well with out-of-the-box workshop support, who would even complain? for anyone wondering, the devs themselves said that this will be free in a short while, so maybe support them before that happens!
3 found this helpful
Recommended Jul 2, 2026
SPACEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
2 found this helpful
Recommended Jul 9, 2026
It's nice to see this finally come to steam There's only the windows version, but it runs normally through proton
1 found this helpful
Recommended Jul 7, 2026
I love space games, like KSP, SFS and especially Celestia. It's kinda cheap, which I don't think should be for this epic of a game. And I'd like to see how stars distant from Earth would look like. With Celestia, you can do just that and a bunch of other stuff. My Overall Rating: 10/10
Recommended Jun 23, 2026
pretty good game that just came out

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