Astrodynamics.jl is archived and will not be developed further. A well-maintained alternative in Julia is SatelliteToolbox.jl. I (@helgee) am working on Lox which is a Rust-based library with a Python interface for interactive use.
A Fresh Approach to Astrodynamics...
Astrodynamics.jl is an MPLv2-licensed toolbox for the development of astrodynamics software in Julia.
This package and most of its dependencies are not yet registered.
You can install all required packages via the AstroDynDev package:
Pkg.clone("https://github.com/JuliaAstrodynamics/AstroDynDev.jl.git")
using AstroDynDev
AstroDynDev.install()