Software · Education & science

Gaia Sky

Explore the universe in 3D.

Completely free
Windows, macOS and Linux
Open source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Flathub
License: MPL-2.0 — Open source (copyleft)confirmed by Flathub, Wikidata
Open source: Yes
Commercial use: Yesconfirmed by Flathub, Official plan pages (pricing, licence, terms)
Account required: not documented
Credit card required: Noconfirmed by Flathub
Watermark: Not applicable
Ads: not documented
Platforms: Windows, macOS and LinuxEstablished by Linux: Flathub, Unspecified source · macOS: Unspecified source · Windows: Unspecified source
Publisher: Zentrum für Astronomie der Universität Heidelberg
Latest version: 3.9.2 (27 October 2026)
Latest activity: 27 October 2026

At a glance

All of Gaia Sky is free: no feature is locked behind a paid plan, and its code is open.

Its licence (MPL-2.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
Commercial use allowed

About

Gaia Sky is an astronomy visualization platform for desktop and VR that runs on Linux, Windows and macOS. It is developed in the framework of ESA's Gaia mission to chart about 1 billion stars of our Galaxy in the Gaia group of the Astronomisches Rechen-Institut (ZAH, Universität Heidelberg). Explore the Solar System, the Milky Way, and even the most distant galaxies of our Universe with up-to-date, real scientific data.

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Unspecified source (platforms) — 9 November 2026
Facts collected from Flathub (credit card, publisher, licence, free status, platforms, commercial use, version) — 7 November 2026
Facts collected from Official plan pages (pricing, licence, terms) (commercial use) — 7 November 2026
Facts collected from Wikidata (licence, platforms) — 5 November 2026
Last technical check: 5 November 2026
Description from Flathub — AppStream (Flathub)

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