Orbits & Ephemerides Overview
Transits.jl 
-[](https://juliaastro.github.io/Transits.jl/stable/)){kind=link}
Flexible photometric transit curves with limb darkening
- Inspired by exoplanet
- Includes Keplerian orbits and generic orbits
- Fully compatible with Unitful.jl
sefffal/PlanetOrbits.jl
-[](https://sefffal.github.io/PlanetOrbits.jl/stable/)){kind=link}
Tools for displaying and solving Keplerian orbits in the context of direct imaging
EarthOrientation.jl
-[](https://juliaastro.github.io/EarthOrientation.jl/stable/)){kind=link}
Earth orientation parameters
- Calculate Earth orientation parameters from IERS tables
JPLEphemeris.jl
JPL Development Ephemerides
- Calculate positions and velocities of solar system bodies
AstroLib.jl
-[](https://juliaastro.github.io/AstroLib.jl/stable/)){kind=link}
Collection of generic astronomical and astrophysical functions
- Translation of many IDL AstroLib procedures