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: 2,793 This Week

Last Update: 2025-08-18
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2

Gpredict

Real time satellite tracking and orbit prediction

Gpredict is a real-time satellite tracking and orbit prediction application. Gpredict can track an unlimited number of satellites and display the data in tables and various graphical view.

21 Reviews

Downloads: 459 This Week

Last Update: 2020-12-19
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3

AudeLA

AudeLA is a TCL extension aimed at providing amateur astronomers with image processing, telescope controling, ccd camera driving, and various astronomical algorithms. Web site : https://sourceforge.net/p/audela/wiki/fr_accueil Web site : https://sourceforge.net/p/audela/wiki/en_welcome

Downloads: 11 This Week

Last Update: 2025-10-29
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4

Stellarium for Java

Java version of Stellarium.

2 Reviews

Downloads: 0 This Week

Last Update: 2013-04-26
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