Stellarium/stellarium
Stellarium is a free GPL software which renders realistic skies in real time with OpenGL. It is available for Linux/Unix, Windows, macOS and Haiku. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope. observed · 2026-08-28
Health v2 · maintenance only
92/100
- Activity 99
- Release rhythm 78
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: 90
- age_days: 4525
- days_rel: 70
- days_push: 7
- n_releases_24m: 8
Adoption not part of the score
9897 stars · 1042 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Stellarium is a free open-source planetarium application that renders a realistic 3D sky in real time using OpenGL, showing what is visible to the naked eye, binoculars, or a small telescope. It is built with C++ and Qt and runs on Linux/Unix, Windows, macOS, and Haiku.
Use cases
- identify stars and constellations in the night sky
- plan telescope observing sessions
- simulate the sky at any date, time, and location
- learn astronomy with a realistic 3D planetarium
- view planets, nebulae, and the Milky Way in 3D
- teach astronomy in classrooms
- track shooting stars and meteor showers
When to choose
- you want a free, realistic desktop planetarium for stargazing or astronomy education
- you need cross-platform sky simulation with extensive star and deep-sky catalogues
- you want scriptable, plugin-extensible astronomy software with a mature codebase
When to avoid
- you need a lightweight web-only tool without installing a desktop application
- you require professional telescope control or research-grade astrometry beyond a planetarium's scope
- you need a mobile-first stargazing app
Facets
application · maturity stable
graphics simulation gui data-visualization astronomy education simulation cross-platform windows cross-platform cpp planetarium opengl qt stargazing telescope sky-rendering open-source science linux macos desktop
3 sources
- readme: https://github.com/Stellarium/stellarium · fetched 2026-08-28 · 021921815cd0
- homepage: https://stellarium.org · fetched 2026-08-29 · 516cb8a7f4ea
- site_page: https://stellarium.org/en/docs.html · fetched 2026-08-29 · ba400a717fc4
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| Stellarium/stellarium | main | 92 |
For agents
markdown · JSON · MCP: product_card(name="Stellarium/stellarium")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem