JavaScript Library for Astronomical Calculations

JavaScript library to get Positions for Astronomical Bodies, including VSOP2013, VSOP2010, VSOP87, TOP2013, TOP2010, ELP2000-MPP02, ELP2000-82b, EPHASTER ephemerides and some home-grown ones (mgstat2023). Optimized for speed and size.

VSOP87 algorithm in Rust

🪐 A fast implementation of the VSOP87 theory in JavaScript.

A Swift package for astronomy

Javascript library for positional astronomy

A wrapper class providing a clean interface for working with Greg Miller's VSOP87-Multilang in C++.

Chinese astronomical calendar, bazi (四柱八字), and divination for TypeScript. Solar terms (節氣) to sub-second precision, lunar calendar (農曆), flying stars (紫白九星), almanac flags (神煞), Six Ren (大六壬) — zero dependencies.

Elegant astronomy for TypeScript. Supercharged by Bun.

Advanced Weather Application with real-time forecasts, astronomical visualization (Sun/Moon arc charts with live tracking, Solar System with VSOP87 calculations), historical statistics, multi-language support (EN/FA), and responsive design. Built with Vanilla JavaScript and Open-Meteo API.

3D Solar system realistic simulation