topocentric

observerly’s lightweight, zero-dependency, fully-tree shakeable 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.

An interactive 3D globe that shows the direction of planets in the solar system from any location on Earth, at any point in time.

Pure-Elixir reader for the JPL DE440 ephemeris — topocentric positions, skyline alignment, moon phase, solar events.