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Celestia - Space Simulator

Celestia - Space Simulator

3D interactive planetarium

317 ratings
246 reviews
📚 Education
🔍 Reference
Free
In-App Purchases

Details

  • Released
  • Updated
  • July 7, 2020
  • August 28, 2026

Features

Developer

林峰 李
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iphone
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🧾$79.99
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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

Summarized from real user reviews of Celestia. Based on 317 reviews and a 4.4/5 average, it highlights the 5 positives and 5 negatives reviewers mention most about this Education app.

Positive things

  • ⭐Realistic space simulation
  • 🌌Ability to explore galaxies and star systems
  • 🔍Detailed planet and moon textures
  • 📷Great for taking screenshots
  • 🤖Reminds users of Space Engine

Negative things

  • 🐛Occasional crashes and glitches
  • 🌌Limited exploration beyond Milky Way and Andromeda
  • 🌍Flat terrain on planets
  • 🔍Lack of detail on some celestial objects
  • 🔒Paywall for some features
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What's New in Celestia

26.8.1

August 28, 2026

1. Data update (2026-08-21) 2. Fix PSF star visibility for daytime atmospheres 3. Add ISO 8601 date display option 4. Update default atmosphere render configuration 5. Rearrange some of the settings

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Subscription plans

Celestia PLUS (Yearly)

Access to all the features in Celestia

$19.991 Year
How to cancel Celestia subscription ⁉️
1

In-App Purchases

$79.99

Celestia PLUS (Lifetime)

Access to all the features in Celestia

Events

Read more about Celebrate 25 Years of Celestia
Event EndedSpecial Event

Celebrate 25 Years of Celestia

Get a personalized UI and seamless add-on access

Feb 26, 2026 — Mar 5, 2026

Read More

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User reviews

Most RecentHighest RatedLowest Rated

add feature

please add latitude and longitude and local temperature and average pressure and local pressure to the info display please
Teekalov20Teekalov20

Great App Indeed

Celestia is one of the few solar system apps out there that you can use to see space in real time! It simulates what you’d actually see in real life! But I’d much prefer if the atmospheres for the planets and moon Titan gets dimmed down a bit. Also, the cloud renderings for Titan extend past the terminator where day and night split. Pluto doesn’t have the atmosphere either like it did before. But overall, great app!
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Cyborg TitanCyborg Titan

AHHHHH THAT MOON IS GONE!!!

Quaoar’s 2nd moon is gone!!! AHHH
Ehm uhh one thing AGAINEhm uhh one thing AGAIN

Trappist-1 not laggy

1st review lying
TilesToInfinity! (hulya ulas)TilesToInfinity! (hulya ulas)

Good But…

This app is good and all but there needs to be more textures to the exoplanets.
LucDelryLucDelry
See 241 more reviews

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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.