Celestia - Space Simulator

Celestia - Space Simulator

3D interactive planetarium

331 ratings
259 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • July 7, 2020
  • September 20, 2026

Features

Celestia - Space Simulator screenshot #1 for iPhone
Celestia - Space Simulator screenshot #2 for iPhone
Celestia - Space Simulator screenshot #3 for iPhone
Celestia - Space Simulator screenshot #4 for iPhone
Celestia - Space Simulator screenshot #5 for iPhone
Celestia - Space Simulator screenshot #6 for iPhone
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About

Explore the universe in real-time 3D. Visit planets, moons, star clusters, and galaxies, viewing them from any point in space and time. Customize your experience with expandable content and detailed simulations.

✓Real-time 3D space visualization
✓Explore planets, moons, stars, galaxies
✓Accurate solar system object positions
✓Interactive planetarium mode
✓Expandable content with add-ons
✓Customizable celestial databases
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What users say

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What's New in Celestia

26.9.1

September 20, 2026

1. Fix multiple eclipse shadows 2. Fix PSF rendering bounds, transitions, and batch state 3. Update the exoplanet catalog 4. Update Kamo'oalewa data and add a shape model 5. Update Didymos and Dimorphos data, models, and textures 6. Improve OBA star texture quality 7. Add support for iOS and iPadOS 27

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4

Subscriptions & In-App Purchases

Celestia PLUS (Yearly)

Access to all the features in Celestia

$19.991 Year
How to cancel Celestia subscription ⁉️

Events

Read more about Celebrate 25 Years of Celestia

Celebrate 25 Years of Celestia

Get a personalized UI and seamless add-on access

Feb 26, 2026 — Mar 5, 2026

User reviews

太好玩了

太好玩了

怎么没有黑洞

全部黑洞的我都搜过了有的是星系有的就没有

Moving in the right direction!

I've been waiting for a mobile space simulator like this! The models are very photorealistic, and there is some excellent atmospheric rendering here. I use this primarily to explore the wonder of the solar system, and making it look as real as possible is my hope. I would suggest an auto-exposure effect when bright objects are in view, realistic lens flare and rays for the sun and other stars to really convey their luminosity. In terms of controls, comparing it to most other simulators like this, it's quite choppy for everything to stop moving as soon as you lift your finger, rather than retaining some inertia. All that being said, bravo on how far this sim has come in terms of graphics!
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关于插件面板的bug

Bug description:
When opening the plugin classification panel in fullscreen mode on iPad, the popup window is rendered at an extremely small fixed size. The panel can be scrolled and items can be clicked normally, but the text is too tiny to read.

Troubleshooting steps I have tried:

1. The app is running in fullscreen mode, no stage manager / split view enabled.

2. Fully closed background process and restarted the app multiple times.

3. Toggled screen rotation between portrait and landscape.

4. Confirmed that the "Zoom" accessibility feature of iPadOS is turned off.

5. Reinstalled the app, the problem still exists.

Environment:
Device: iPad
OS: iPadOS
App version: [26.9.1]

Expected behavior:
The plugin panel window should automatically resize to fit the screen, and all text should be readable.

Actual behavior:
Plugin panel is locked in a tiny narrow window, interactive functions work but the content cannot be read.
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Why is celestia crashing

Celestia keeps crashing for no reason Im trining to press buttons but it’s crashing the app please fix it

Developer apps

User experience

🐞

Reported Bugs

3 issues

Milky Way and other galaxy textures not loading properly

Bug

Crashes when using certain add-ons

Bug

Issues with planet and moon orbits not being accurate

Bug
✨

Requested Features

5 requests

Add more exoplanets and distant star systems

Feature

Implement terrain generation for planets

Feature

Expand to include more galaxies and the overall universe structure

Feature

Add support for black holes, pulsars, and other exotic objects

Feature

Improve controls and camera movement

Feature

FAQ

What does Celestia do?

Celestia is a real-time 3D space simulator that allows you to explore the universe. You can visit a vast array of celestial objects, including planets, moons, star clusters, and galaxies, and view them from any perspective in space and time.

What are the key features of Celestia?

Key features include real-time 3D visualization of space, accurate simulation of solar system object positions and movements, an interactive planetarium mode for viewing the sky from any celestial body, and expandable content through add-ons for new objects and textures.

Is Celestia free to use?

The application is free to download and use, but it does offer in-app purchases. These purchases may provide access to additional content or features beyond the core simulation.

What kind of celestial objects can I explore?

You can explore a wide range of celestial objects, including planets, moons, star clusters, and galaxies. The database is expandable, meaning you can add more objects like comets, stars, asteroids, and even fictional spacecraft through add-ons.

Can I customize the content in Celestia?

Yes, Celestia's content is highly customizable. You can expand its catalogues with various add-ons that introduce new objects, high-resolution textures for planets, and 3D models for asteroids and spacecraft, allowing you to tailor the simulation to your interests.