Stellarium

Web · Windows · Mac · Linux

Freedom report

Three barsScore 6.6

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely4 of 6 device platforms
DocumentedPlans, terms and facts published

Stellarium is ranked #8 of 34 in astronomy apps on Freedom251. It runs on Linux, macOS, Web, Windows. There is a free plan.

Stellarium plans and pricing

All plans

Stellarium Free Free open source planetarium for your computer stellarium.org · 8 Oct 2026

Compared on astronomy apps

Free plan: Yes
Offline access: Yes
Platform coverage: desktop
Telescope control: Yes
Mission tracking: Yes

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The record

Purpose: Stellarium is a free, open source planetarium for computers that shows a realistic sky in 3D.
Star catalogues: The default catalogue contains over 600,000 stars, with extra catalogues containing more than 220 million stars.
Deep-sky objects: The default catalogue includes over 80,000 deep-sky objects, with an extra catalogue containing more than 1 million.
Sky cultures: It includes constellations for more than 40 cultures and calendars for more than 35 cultures.
Sky simulation: Features include realistic atmosphere, sunrise and sunset, planets and satellites, and eclipse simulation.
Telescope and remote control: The interface includes telescope control and an HTTP interface for web-based control and remote control API access.
Customisation: Users can add plugins, solar system objects from online resources, deep-sky objects, landscapes, constellation images, and scripts.
Latest release: The official site links to version 26.3 as the latest version; its release notes list it as released on September 28, 2026.
Desktop platforms: The site provides downloads for Linux, macOS, and Windows, including Windows ARM64.
System requirements: Minimum requirements include a 64-bit OS, 1 GiB RAM, 1 GiB disk space, and compatible 3D graphics.
Support: The project directs users to discussions, a mailing list, a wiki, an FAQ, and GitHub for support, bug reports, and feature requests.
Web version: The official site links to Stellarium Web, an online star map.
Security: The opened official pages do not state security certifications or compliance claims.
Maker: The site names a project coordinator and developer team but does not state a company name, headquarters, or founding year.
Price from: Free

Where it ranks on Freedom251

Best Astronomy Apps in 2026#8 of 34

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Sources

stellarium.org· checked 8 Oct 2026
github.com/Stellarium/stellarium/releases· checked 8 Oct 2026