meeus

A library designed to ease geographic coordinate format conversions, and determine sun/moon information in C#

An astronomical library

Library of astronomical algorithms in Python

Arduino library to calculate the times of sunrise, sunset, solar noon, twilight, the solar position, and more.

Java port of Ephemeris calculations by Peter Hayes

C# Astronomy Library

Library of astronomical algorithms in Python to compute planets ephemeris and phenomena

Javascript library for positional astronomy

moon and seasons clocks, script for calculating moon phases and equinoxes/solstices

A Rust native library for astronomical calculations, a libnova-oxi shortly

A Swift package for astronomy