Open Source Astronomy Software

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.

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.

Java based astronomical logging software which stores it's data in a free and open XML based format (OpenAstronomyLog). Discontinued project: Please check out the fork: https://github.com/capape/observation-manager for an updated version

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

Calculate Sunrise, Sunset and dawn times. The calculation based on sunriset by Paul Schlyter. 64 bit windows users: There are 64 bit windows binarys in the file section.

This program was inspired by Mire De Collimation program written by Gilbert Grillot and Al's Collimation Aid. I combined best features of both and addes some of my own. Purpose of this program is not to reinvent the wheel, but rather to learn new technologies, become better at colimating my telescope and to learn something new. Main purpose of this program is to help you with aligning optical elements of your telescope such as secondary mirror, primary mirror, focuser, etc. Collimation Circles is developed with .NET 7 and AvaloniaUI Framework using MVVM architecture patern. Program was tested on Windows 10 and 11, Ununtu Linux 22.04.1 LTS (Wayland) and Raspberry PI OS Bullseye. I'm not able to test it on macOS, but it should work. Suggestions and contributions are welcome!

Ham's Actor is a software for radio hams. Is a bundle of many functions and tools, so you just have to have one software. Functions: Log Book, GrayLine, satellite tracing, contesting, maps, callbook, and so on...

Gravitation is an interactive program, which tries to simulate the dynamics of celestial objects in their mutual gravitational field.

Berechnung astronomischer Erscheinungen.

Astro Info is a multi-lingual astronomical ephemeris for the PalmOS that provides data for our solar system and other objects. If you wish to get involved, please download a copy of the source code from CVS.

With this tool you can manage your equipment and plan and log your observations. You can create a logbook (as a PDF) from your logged observations.

Ciclope Planetarium is a web-based planetarium that provides a simulation of the sky from any location at any time and date. Developed using Google Maps API & AJAX. Available in PHP & J2EE. Integrated in the Ciclope Stars project (www.ciclope.info/stars)

The aim of this project is to produce high-res/quality printable star maps according to your latitude. This projected was founded at the Deutsche SchülerAkademie Steinmühle 2004. It's a cooperation of the astronomy and cg courses.

Der Elektro-L Gif-Maker erstellt aus Bildern, die von der russischen Raumfahrtagentur zur Verfügung gestellt werden, GIF-Animationen der Erde der letzten 24 Stunden. Dabei werden die 10 Kanäle berücksichtigt sowie eine Gesamtanimation in RGB berechnet. Dank geht an websquid für die Idee. Reimplementiert in C und nach Github umgezogen: https://github.com/simonpl/elektrol-gif-maker Logo: NTS-OMZ

displays the current phase of the Moon as an applet for the gnome panel. Clicking on the applet displays sundry data pertaining to the moon including various clock functions. The user can select between a real image as well as a cartoon image of the

GRad is a standalone solar radiation model, programmed in Java. It is capable of the calculation of potential (clear sky) and actual (real sky) irradiance and total irradiation for single and multiple geographical locations. Note that, while fully functional, this application is currently not developed any further.

Android application that displays list of halachic/halakhic times for Jewish prayers (zmanim and zmanei tefillot).

This Program supports the Planet- and Variable-Hunting in the Kepler-Data.

This program calculates approaching solar eclipses. For this purpose, it calculates the positions of sun, moon, mercury and venus in the horizontal coordinate system. These values can be visualized and exported in many common formats.

SImg is astronomical image processing software for Linux. Some of the features are deconvolution (various algorithms), removing interferences, automatic shifting of images, computation of PSF and and a visualization tool.

Setistaus is a PHP script that displays the status of one or more SETI@home clients on a Web page.

Simulation of star movements with great visualizations of flights through star fields.

You can organize and analyze your spectroscopic data.

Java version of Stellarium.

Wo ist Io ist eine Android Astronomie Anwendung, die Daten über Himmelskörper im Sonnensystem berechnet. Es bietet Auf- und Untergangs Visualisierungen und -Zeiten für alle Planeten und eine Spiral-Graph Ansicht der Jupitermonde für nächsten Tagen