Celestia

Linfeng Li

In-app purchases

About this app

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.

Ratings and reviews

Nice program that uses a lot of disk space. Too bad there isn't an option to move it to the SDCARD which a lot of programs allow since they are not priority system apps or apps of security. App Info in settings does not give that option to move to sdcard thereby leaving the app stuck on internal memory that is critical to phone operation.

Beautiful space explorer with accurate scale of the objects. You can freely roam around the near universe, maybe not to the same extent as Space Engine, but to a good extent. The only thing I did not like was the fact that black hole outer rings spin as fast as the inner rings, and the lack of optical distortion, but I would think that depends solely on the implementation of the add-on they come with. At any rate, this is the best space exploration app I have found on the Play Store.

Great astrophotography, and exploration game the simulation Is super realistic but I have an idea and that is to add realistic mode, which contains sun rays and water and ground simulation, which could indeed spice up the game.

What’s new

1. Remove Mir add-on
2. Additional comets for Celestia (2025)
3. Minor corrections to radii/diameters of comets
4. nearstars.stc update (2025-05-25)
5. Solar System update (2025-05-25)
6. Revised rotation periods for Giacobini–Zinner, Hale–Bopp, and Siding Spring
7. Better temperature calculation
8. Default emissivity should be 1