Open-source astronomy software
30 open-source libraries, tools and applications tagged astronomy, ranked by how closely astronomy is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.
30 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| r-spacex/SpaceX-API An open-source REST API serving SpaceX launch, rocket, core, capsule, Starlink, launchpad, and landing pad data, hosted publicly at api.spa… | 10 | 10911 | active |
| Stellarium/stellarium Stellarium is a free open-source planetarium application that renders a realistic 3D sky in real time using OpenGL, showing what is visible… | 90 | 10045 | stable |
| astropy/astropy Astropy is the core Python package of the Astropy Project, providing commonly used tools for astronomy and astrophysics such as units, coor… | 94 | 5329 | stable |
| achael/eht-imaging eht-imaging (ehtim) is a Python library for simulating, calibrating, and manipulating very long baseline interferometry (VLBI) data and rec… | 92 | 5324 | active |
| sgoudelis/ground-station Ground Station is an open-source, browser-based application suite for tracking satellites and celestial targets, controlling station hardwa… | 81 | 4819 | active |
| mourner/suncalc SunCalc is a tiny, dependency-free JavaScript library for calculating sun position, sunlight phases (sunrise, sunset, dusk), moon position,… | 90 | 3473 | stable |
| virtualagc/virtualagc Virtual AGC is a project providing emulators for the Apollo Guidance Computer (AGC), Abort Guidance System (AGS), and related peripherals l… | 68 | 3308 | active |
| CelestiaProject/Celestia Celestia is a free, open-source real-time 3D space simulation that lets users explore the universe, traveling seamlessly from galaxy cluste… | 67 | 2373 | active |
| da-luce/astroterm astroterm is a terminal-based planetarium written in C that renders real-time positions of stars, planets, constellations, and moon phases … | 84 | 2069 | active |
| sky-map-team/stardroid Sky Map (formerly Google Sky Map) is an open-source Android astronomy app that identifies stars, planets, and constellations by pointing yo… | 100 | 1889 | active |
| skyfielders/python-skyfield Skyfield is a pure-Python astronomy library that computes high-precision, research-grade positions for planets, moons, and Earth satellites… | 76 | 1775 | stable |
| AllskyTeam/allsky Allsky is an open-source application that turns a Raspberry Pi and a compatible camera (ZWO or Pi/Arducam sensors) into an all-sky camera f… | 94 | 1635 | active |
| dfm/emcee emcee is a stable, well-tested Python implementation of the affine-invariant ensemble sampler for Markov chain Monte Carlo (MCMC) proposed … | 67 | 1603 | stable |
| KeepTrack.space KeepTrack is a TypeScript astrodynamics application that provides real-time 3D visualization of 50,000+ satellites and millions of debris o… | 96 | 1600 | active |
| rt-bishop/Look4Sat Look4Sat is an open-source, ad-free satellite tracker and pass predictor for Android, inspired by Gpredict. It calculates satellite positio… | 96 | 1497 | active |
| OpenSpace/OpenSpace OpenSpace is an open-source interactive astrovisualization application that renders the entire known universe, from planetary surfaces to g… | 87 | 1257 | active |
| liwenxi/SWIFT-AI SWIFT-AI is a deep learning system for extremely fast gigapixel-level visual understanding in scientific applications, such as detecting st… | 29 | 1250 | active |
| csete/gpredict Gpredict is a real-time satellite tracking and orbit prediction desktop application using SGP4/SDP4 propagation with NORAD TLE data. It dis… | 92 | 1188 | stable |
| OpenAstroTracker OpenAstroTracker is a repository of CAD (OpenSCAD) and STL files for a cheap, 3D-printed DSLR tracking, GoTo, and autoguiding mount for ast… | 23 | 1153 | active |
| hannorein/rebound REBOUND is an open-source N-body integration library for simulating the gravitational motion of particles such as stars, planets, moons, an… | 99 | 1144 | active |
| deepskystacker/DSS DeepSkyStacker is a freeware application for registering and stacking deep-sky astrophotography images to improve signal-to-noise ratio. Or… | 90 | 1140 | active |
| shashwatak/satellite-js A TypeScript/JavaScript library implementing SGP4 and SDP4 orbital propagation from TLE and OMM data, usable in web and Node.js environment… | 89 | 1091 | active |
| nasa/apod-api NASA's open-source microservice that serves the Astronomy Picture of the Day (APOD) API, returning JSON metadata and image links parsed fro… | 66 | 1086 | active |
| cosinekitty/astronomy Astronomy Engine is a multi-language library for calculating positions of the Sun, Moon, and planets, and predicting astronomical events li… | 23 | 1047 | stable |
| sunpy/sunpy SunPy is the community-developed open-source Python package for solar physics, providing a solar data analysis environment built on the sci… | 88 | 1035 | active |
| chubin/pyphoon pyphoon is a Python command-line tool that renders the current phase of the Moon as ASCII art, based on Jef Poskanzer's 1979 Pascal origina… | 32 | 1520 | maintenance |
| astroML/astroML AstroML is a Python library for machine learning, statistics, and data mining aimed at astronomy and astrophysics, built on numpy, scipy, s… | 32 | 1203 | maintenance |
| poliastro/poliastro poliastro is a pure Python library for interactive astrodynamics and orbital mechanics, offering orbit propagation, maneuver planning, and … | 10 | 1014 | abandoned |
| AidLux (AidLearning) AidLux (originally AidLearning) is an AIoT development platform that runs a native Ubuntu Linux environment with GUI, deep learning tooling… | 63 | 5812 | active |
| orbitersim/orbiter Orbiter is an open-source space flight simulator based on Newtonian mechanics, letting users pilot historic, hypothetical, or fictional spa… | 66 | 1986 | active |
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