observerly’s lightweight, zero-dependency, type-safe astrometry library for TypeScript. Accurately determine the positions of the Sun, Moon, and planets, handle coordinate transformations with ease, calculate transit times for any celestial object, and integrate precision astronomy into your projects with clean, dependency-free code.

Source code for the MinuteLabs.io Eclipse Explorer

Visualize weather forecasts to help plan your trip to see an eclipse! 🌑🌞

Data, code, images, and text to enlarge one's world

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.