Best Open Source Astronomy Software 2025

Astronomy Software

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Browse free open source Astronomy software and projects below. Use the toggles on the left to filter open source Astronomy software by OS, license, language, programming language, and project status.

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1

Stellarium

A planetarium software that shows a 3D simulation of the night sky

Stellarium renders 3D photo-realistic skies in real time with OpenGL. It displays stars, constellations, planets, nebulae and others things like ground, landscape, atmosphere, etc.

344 Reviews

Downloads: 2,902 This Week

Last Update: 2025-08-18
See Project
2

Stellarium for Java

Java version of Stellarium.

2 Reviews

Downloads: 0 This Week

Last Update: 2013-04-26
See Project