Java sun position code (topocentric coordinates, sunrise/sunset/twilight) based on the NREL SPA and ENEA/Grena algorithms.

VSOP87 in multiple programming languages

A full featured 100% Java library for reading and writing FITS files

Telescope.Touch is the definitive mobile planetarium, also featuring full telescope control via INDI.

A stellar cartography system

A simple cross-platform desktop utility for amateur astronomy hobbyists, written in Java. The aim is to provide an easy to use tool to help planning sky observation sessions, suggesting some of the interesting objects you may be able to watch at naked eye, or using amateur equipment (binoculars or small to medium size telescopes) in a given date…

The fact-tools are an extension to the streams framework to analyse the data of the First G-APD Cherenkov Telescope.

Advanced telescope focuser, with Java control panel and INDI/ASCOM integration.

Calculate the phase, distance, phase-angle, and illuminated ratio of the moon on any given date.

ADQL grammar valdation

Create a new bright star catalog out of existing catalogs.

Scripting-friendly CLI program to calculate accurate topocentric sun position, sunrise, sunset and twilight times

Maps a light curve to a transit shape.

An alternative Celestron mount controller with INDI integration

Generate a star atlas (PDF) designed to teach the constellations. Inspired by the Edmund Mag 5 Star Atlas.

SunCalc is a simple Java project that calculates the sunrise and sunset times based on geographic location and date.

Java numerical classes for astronomy and beyond

A maintained fork of the most popular Java library for reading and writing FITS files