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kerykeion

Data-Driven Astrology 💫 Kerykeion is a Python library for astrology. It generates SVG charts and extracts detailed structured data for birth charts, synastry, transits, composite charts, and more.

spiceypy

SpiceyPy: a Pythonic Wrapper for the SPICE Toolkit.

anise

ANISE provides a toolkit and files for Attitude, Navigation, Instrument, Spacecraft, and Ephemeris data. It's a modern replacement of the NAIF SPICE toolkit.

calcchinesecalendar

High-precision Chinese lunar calendar tool based on JPL DE ephemeris.

kosmorrolib

Kosmorrolib, a library to calculate ephemerides.

moira-astro

Astronomy-first pure-Python ephemeris and astrology computation engine with transparent, auditable calculations.

planetmapper

PlanetMapper: An open source Python package for visualising, navigating and mapping Solar System observations

libephemeris

NASA-powered Python library for high-precision astronomical ephemerides. Features an API compatible with Swiss Ephemeris (pyswisseph) and utilizes Skyfield for professional-grade celestial calculations and orbital data.

gmat-run

Run GMAT mission scripts from Python and get results as pandas DataFrames.

stellium

A modern Python library for astrological chart calculation, visualization, reporting and data analysis. Built on the Swiss Ephemeris for astronomical accuracy.

astronomia

Python package to calculate ephemeris of Sun, Moon, and planets.

azely

:zap: Azimuth/elevation calculator for astronomical objects

eph

Retrieve, represent and manipulate JPL Horizons ephemerides.

spacetracktool

A Python class for making requests to space-track.org

pyplanets

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

ephemeris-mcp

Precision astronomical ephemeris calculations via Model Context Protocol (MCP). Provides planetary positions using Swiss Ephemeris.

starward

An educational astronomy calculation toolkit with a soul. Show your work with --verbose mode. Sun/Moon positions, rise/set times, twilight, phases, coordinate transforms, Julian dates, and visibility planning. Pure Python, no compiled dependencies.

starlight-astro

A modern Python library for astrological chart calculation and visualization, built on the Swiss Ephemeris for astronomical accuracy.

ewia

Library to calculate apparent positions of astronomical objects