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Celestia
A real-time 3D space simulator and interactive planetarium. Travel to any planet, moon, star, or galaxy and view it from any point in space and time. Accelerate time, land on alien worlds, and expand the universe with community-made add-ons.

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Features
Single-player
Steam Workshop
Family Sharing
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Languages:
Interface Full Audio Subtitles
English ✔
French ✔
Italian ✔
German ✔
Spanish - Spain ✔
Arabic ✔
Bulgarian ✔
Dutch ✔
Greek ✔
Hungarian ✔
Japanese ✔
Korean ✔
Norwegian ✔
Polish ✔
Portuguese - Brazil ✔
Portuguese - Portugal ✔
Romanian ✔
Russian ✔
Simplified Chinese ✔
Spanish - Latin America ✔
Swedish ✔
Traditional Chinese ✔
Turkish ✔
Ukrainian ✔
See all 24 supported languages
This game is not yet available on Steam

Planned Release Date: Q2 2026

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About This Game

Celestia — real-time 3D visualization of space

3D 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.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS *: Windows 7 SP1 / Windows 10 (64-bit)
    • Processor: Dual-core 2.0 GHz (Intel Core 2 Duo / AMD equivalent)
    • Memory: 2 GB RAM
    • Graphics: OpenGL 2.1-capable GPU with 512 MB VRAM (Intel HD 4000 / NVIDIA GT 220 / AMD HD 5450)
    • Storage: 500 MB available space
    • Additional Notes: Internet connection required for Workshop content
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: Windows 11 (64-bit)
    • Processor: Quad-core 3.0 GHz (Intel i5-6600K / AMD Ryzen 5 1600 or better)
    • Memory: 8 GB RAM
    • Graphics: OpenGL 4.x-capable GPU with 2 GB VRAM (NVIDIA GTX 1050 / AMD RX 560 or better)
    • Storage: 2 GB available space
    • Additional Notes: Internet connection required for Workshop content
* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.
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