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.

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

SkytechX is free astronomical planetarium for rendering real objects (stars, planets, comets etc.) on the map. Program works with range of years 1 AD and 3000 AD. Main catalogue is Tycho2 with more than 2.5 millions of bright stars. Customized internal catalogue of non-stellar objects has been composed of several sources like NGC, IC, PGC, Messier etc. and contains more than 100,000 of objects. The planetarium allows you to connect your telescope via ASCOM6 platform. You can search for solar or moon eclipses, planet conjunctions and other events in given time range. Supports work with overlayed DSS-FITS images directly on the map.

Numerology diagram creator with aim to ease making numerology interpretations.

Java version of Stellarium.