* [Astro v0.3.0](https://github.com/Starainrt/astro) – Go library for astronomy algorithms: Chinese lunar calendar conversion, planetary positions, sunrise/sunset, and moon rise/set.

* [orb.js v3.1.1](https://github.com/lizard-isana/orb.js) – JavaScript library for astronomical calculations including Sun, Moon, planets, Keplerian propagation, and SGP4/OMM satellite predictions with observer-based event searches.