A free open source desktop planetarium for your computer

Stellarium

Stellarium

  -  438.88 MB  -  Open Source
  • Latest Version

    Stellarium 26.1 (64-bit) LATEST

  • Review by

    Marian Marinescu

  • Operating System

    Windows 10 (64-bit) / Windows 11

  • User Rating

    Click to vote
  • Author / Product

    Fabien Chereau / External Link

  • Filename

    stellarium-26.1-qt6-win64.exe

  • MD5 Checksum

    e204bac17bb4d3f68a0f265f2a182cdb

Stellarium is a free, open-source planetarium software for Windows designed for astronomy enthusiasts, educators, and anyone interested in exploring the night sky.

Stellarium Screenshot 1

It provides a highly detailed and realistic simulation of stars, planets, nebulae, and other celestial objects, allowing users to view the sky as it would appear from any location on Earth.

With a vast catalog of over 600,000 stars and deep-space objects, Stellarium for PC is widely used in educational settings and by amateur astronomers for planning observations.

Key Features

Realistic Night Sky Simulation – Displays stars, planets, moons, constellations, and deep-sky objects with high accuracy.

Extensive Object Database – Over 600,000 cataloged stars and nebulae, with additional databases for more celestial objects.

Telescope Control – Connects to telescopes via third-party plugins for automated tracking.

Time Travel Feature – Simulates sky conditions at any past or future date.

Constellations and Mythology – Displays constellation lines, names, and mythological figures from different cultures.

Customizable Views – Allows users to adjust sky elements, landscapes, and atmospheric conditions.

Educational Tools – Includes labels, grids, and overlays for learning and teaching astronomy.

Scripting Support – Enables automation and custom simulations using scripts.

Stellarium Screenshot 2

Installation and Setup
  • Download this program from the official website or FileHorse.
  • Run the installer and follow the on-screen instructions.
  • Choose installation options, including the default directory and additional plugins if needed.
  • Launch the application and configure your viewing location using GPS coordinates or selecting a city.
  • Adjust settings such as sky brightness, labels, and object visibility according to preference.
How to Use

Set Location – Use the location window to specify your observing position.

Explore the Sky – Click and drag to move around the sky, zoom in with the mouse wheel.

Search for Objects – Use the search tool to find stars, planets, or constellations.

Stellarium Screenshot 3

Time Control – Adjust the date and time slider to simulate past or future celestial events.

Enable Telescope Mode – If using a telescope, configure and connect it for guided tracking.

Use Shortcuts – Learn keyboard shortcuts to toggle grids, labels, and other features quickly.

FAQs

Is Stellarium free to use?
Yes, this program is completely FREE and open-source. However, premium versions with additional features are available for mobile devices.

Can Stellarium control my telescope?
Yes, with the appropriate plugin, it can connect to and control various telescope models.

Does Stellarium work offline?
Yes, it works entirely offline once installed, but online features like database updates require an internet connection.

Can I use Stellarium for astrophotography planning?
Yes, this app is widely used for planning astrophotography sessions by simulating star positions and visibility.

Is Stellarium available for macOS and Linux?
Yes, the software is cross-platform and available for Windows, macOS, and Linux.

System Requirements
  • OS: Windows 7, 8, 10, 11 (64-bit)
  • Processor: 2 GHz dual-core or higher
  • RAM: 2 GB (4 GB recommended)
  • Graphics: OpenGL 3.3 compatible GPU
  • Storage: 1 GB of available space
PROS
  • Free and open-source
  • Realistic sky simulation with a vast celestial database
  • Telescope control capability
  • Educational and customizable
  • Works offline after installation
CONS
  • Requires a decent GPU for smooth rendering
  • Some advanced features need plugins
Conclusion

Stellarium is an outstanding planetarium software for anyone interested in astronomy, from casual stargazers to serious amateur astronomers. Its detailed sky simulation, telescope control support, and educational features make it a valuable tool for planning observations and learning about celestial objects.

Also Available: Stellarium for Mac

Why is this app published on FileHorse? (More info)
  • Stellarium 26.1 (64-bit) Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

    Stellarium 26.1 (64-bit) Screenshot 1
  • Stellarium 26.1 (64-bit) Screenshot 2
  • Stellarium 26.1 (64-bit) Screenshot 3
  • Stellarium 26.1 (64-bit) Screenshot 4

What's new in this version:

Added:
- support to non-standard regions in list of sky cultures
- Chinese (Xianglin Star Chart) and Manchu sky cultures
- ability to change the density of grid lines
- ability to disabling show an OAG angular limits
- FOV-dependent Moon enlargement
- Time Navigator plugin
- “Planetary Events” feature for Time Navigator plugin
- missing full stops in narration
- Mongolian and Hieroglyph fallback fonts (Windows)
- improvements for ASCOM telescopes
- support of new time step: Metonic cycle
- examples for select the planetary features in scripts
- missing flag for InfoBox
- link to MPC’s list of bright minor planets in opposition available for 2026 into Solar System Editor plugin
- vcs-browser URL into metadata

Fixed:
- path to territory.geojson
- translation regions in GUI
- visual style for new feature in the Sky Cultures tab
- observing list window displaying incorrect list name after delete
- crash when trying to reach View dialog
- comet tail extinction
- deleting items from observing lists
- saving description in observing lists
- compilation on Windows
- compilation on macOS Tahoe
- orbital parameter of HIP91919 and parallax of HIP 28360
- crash: avoid NaN result
- scaling of meteor shower icon
- scaling of other object pointers
- size of meteor shower, satellite, DSO pointers
- wrong defaults in Extinction
- typo in asterism
- spelling error
- an assertion
- compilation for Qt5
- select single constellation in some languages
- sync for InfoBox’s flags
- detecting dependencies for Text-To-Speech feature
- docs
- scripting API docs
- typos in sky cultures
- compilation with Qt 6.10+: QXlsx switched to master to avoid compiling issue when Qt 6.10+ is used
- Spelling in Roman calendar in Calendars plugin
- year of copyright and version of application
- crash at exit from Stellarium
- DOI for citation

Changed:
- Changed core And GUI: Expansion of skycultures through spatial and temporal extent
- Changed core: Change how zoom limits for map in sce are handled
- Changed core: Make object searches return StelObjectP
- Changed core: Rewrite SearchDialog logic
- Changed core: Strip away some HTML decoration from infostring and narration
- Changed core: Use translation setting for Zodiac/Lunar Station infostring labels
- Changed core: Refinements for TextToSpeech output
- Changed core: Increase minimum number of facets of the planetary mesh
- Changed core: Allow Vec4 in RemoteControl API
- Changed core: Re-enable high graphics mode for OpenBSD and NetBSD operating systems
- Changed core: Added improvements for support ARM64 architecture on Windows
- Changed core: Re-enable high graphics mode for OpenBSD and NetBSD
- Changed core: Take care of application font change
- Changed logger: fix for Haiku OS name detection
- Changed logger: improved hardware detection for OpenBSD
- Changed logger: cosmetic fixes for Solar System Editor plugin
- Changed scripting engine: Also remove labels, skyImages and screenImages when clearing the scene in a script
- Changed behavior of AstroCalc/Phenomena tool: do not disable selection of the objects when list of phenomena is empty (the mode “Last selected object” is enabled)
- Changed OnlineQueries plugin: Updated ASE URL
- Updated albedo texture of the Moon
- Updated planetary nomenclature
- Updated default list of comets and minor planets
- Updated translations
- Updated default catalog of exoplanets
- Updated list of contributors
- Updated discovery circumstances for comets and minor planets
- Updated photometry data for artificial satellites
- Updated Babylonian (MUL.APIN) sky culture
- Updated Norse (Edda) sky culture
- Updated Help dialog: added Scenery3D movement keys
- Updated DSO catalog to v3.23

Removed:
- a broken duplicate of page_surveys
- ridiculously huge minimumSize from culturesListWidget
- duplicate sky culture layout from Survey tab
- code for autoselect of the discrete graphics cards