Software

Astropy
Core developer · Coordination Committee · Strategic Planning

The community core package for astronomy in Python. The collaboration received the 2025 AAS Lancelot M. Berkeley Prize, a 2023 IOP Publishing Top Cited Paper Award and the 2022 ADASS software prize.

galax

Orbit integration, potentials and stream generation — GPU-accelerated and fully differentiable.

plum

Multiple dispatch for Python, with type-hint-driven method resolution — the dispatch layer under quax and unxt.

coordinax

Vectors, frames and transformations — differentiable, and unit-aware via unxt.

unxt

Unit-aware quantities that survive jit, grad and vmap.

quax

Custom array-ish types that work with JAX primitives — the substrate the rest of the stack builds on.

cosmology.api

A standard interface for cosmology libraries

diffraxtra

Extras for Diffrax

galactic_dynamics_interoperability

Interoperability between galactic dynamics libraries

is_annotated

Check whether a type hint is Annotated

jaxmore

There's more to JAX

macro_lightning

Constrain macroscopic dark matter with lightning

mvgkde

Multivariate Gaussian KDE

optional_dependencies

Construct checks for optional dependencies

phasecurvefit

Paths through phase space

plotting_backends

Dispatch over plotting backends

quax-blocks

Building blocks for quax classes

quaxed

Pre-quaxed libraries

spexial

scipy.special in JAX

trackstream

Stellar stream tracks

dataclassish

dataclasses, for everything

oncequinox

Singletons for Equinox

preamble

A LaTeX preamble worth reusing

xmmutablemap

An immutable mapping, JAX-compatible

zeroth

Efficiently get the index-0 element of any iterable

Other Open-Source Contributions44