Open source

Software & Code

Open-source Python packages and interactive tools for Bayesian inference, stellar astrophysics, and astronomical data analysis.

38Repositories
574GitHub stars
127Total forks
73kPyPI downloads / mo
6PyPI packages
Flagship package adoptionGitHub stars & PyPI downloads
dynesty73k/mo PyPI★ 426
brutus50/mo PyPI★ 56
lf2i12/mo PyPI★ 26
aparture★ 20
frankenz14/mo PyPI★ 18
allsky★ 5
Ecosystem by domain & role38 repositories across 8 categories
Inference & sampling9
Stellar & Galactic3
Extragalactic & cosmology2
Data visualization1
Literature & LLM tools1
Teaching & tutorials8
Websites5
Scratch & misc9
Lead author (27)Co-author / Collab (2)Contributed forks (9)

Python · Updated Oct 2026

dynesty

Dynamic nested sampling for Bayesian posteriors & evidences
426stars
92forks
73kdownloads / mo
$ pip install dynesty
GitHub ↗Docs ↗Paper ↗

Python · Updated Oct 2026

brutus

Stellar properties, distances & extinctions via brute-force Bayesian inference
56stars
14forks
50downloads / mo
$ pip install astro-brutus
GitHub ↗Docs ↗Paper ↗
Preview of the allsky visualization

allsky

An animated, interactive all-sky map of stellar motion across the Milky Way, the visualization behind the 2021 Dunlap "interactive map of the Milky Way" feature.

Open the live 3-D visualization ↗

All Repositories & Packages

Python · Updated Oct 2026

dynesty

★ 426 · 92 forks · 73k/mo
Dynamic nested sampling for Bayesian posteriors & evidences
★ FeaturedInference & samplingPyPI: dynesty
GitHub ↗Docs ↗Paper ↗

Python · Updated Oct 2026

brutus

★ 56 · 14 forks · 50/mo
Stellar properties, distances & extinctions via brute-force Bayesian inference
★ FeaturedStellar & GalacticPyPI: astro-brutus
GitHub ↗Docs ↗Paper ↗

Python · Updated Oct 2026

lf2i

★ 26 · 4 forks · 12/mo
Likelihood-free frequentist inference with finite-sample coverage guarantees
Inference & samplingPyPI: lf2iCo-Maintainer
GitHub ↗Docs ↗

JavaScript · Updated Oct 2026

aparture

★ 20 · 4 forks
An LLM-powered tool to help sift through the arXiv
★ FeaturedLiterature & LLM tools
GitHub ↗Docs ↗

Python · Updated Oct 2018

frankenz

★ 18 · 3 forks · 14/mo
Photometric redshift estimation (a photo-z monstrosity)
Extragalactic & cosmologyPyPI: frankenz
GitHub ↗

JavaScript · Updated Oct 2026

allsky

★ 5 · 1 fork
An animated, interactive 3-D map of Galactic motion
Data visualization
GitHub ↗Live App ↗

Jupyter · Updated Feb 2023

nrp_astrobayes

★ 4
Worked example accompanying Eadie et al. (2023)
Inference & sampling
GitHub ↗

Jupyter · Updated May 2023

typical_sets

★ 3 · 1 fork
The role of typical sets in (MCMC) sampling
Teaching & tutorials
GitHub ↗

Jupyter · Updated Sep 2019

phot_bias

★ 2 · 1 fork
Biases in maximum-likelihood photometry (paper companion)
Inference & sampling
GitHub ↗

Jupyter · Updated Dec 2016

UCSC-Python-Coffee

★ 1
Simple demonstration of scikit-learn for Python Coffee at UCSC on 12/8/2016.
Teaching & tutorials
GitHub ↗

Jupyter · Updated Feb 2019

AY191

★ 1
Statistical exercises for Astronomy 191 (Spring 2019) at Harvard
Teaching & tutorials
GitHub ↗

Jupyter · Updated Oct 2025

ast424-2025

★ 1 · 2 forks
Code for AST424 in the 2025F term
Teaching & tutorials
GitHub ↗

Jupyter · Updated Jun 2026

utssrp-2026

★ 1 · 2 forks
Research project from the UTSSRP 2026 summer program
Teaching & tutorials
GitHub ↗

Python · Updated Nov 2026

binference

★ 1
Population and hierarchical Bayesian inference with probability density functions
Inference & sampling
GitHub ↗Docs ↗

Python · Updated May 2017

nestle

Pure Python, MIT-licensed implementation of nested sampling algorithms for evaluating Bayesian evidence
Inference & samplingFork
GitHub ↗Docs ↗

Python · Updated Aug 2017

prospector

Python code for stellar population inference from spectra and SEDs
Extragalactic & cosmologyFork
GitHub ↗Docs ↗

Updated Mar 2023

STA130-W23

Files for STA130 for the 2023 Winter Term at the University of Toronto
Teaching & tutorials
GitHub ↗

Python · Updated Aug 2026

jumufraktiv

Model evidence, posterior density & moments via fractional derivatives of prior MGFs (with Siyang Li)
Inference & samplingPyPI: jumufraktivCo-Maintainer
GitHub ↗

Updated Oct 2026

fabulous

Frequentist and Bayesian (FaB) hybrid inference with arbitrary models
Inference & samplingFork
GitHub ↗Docs ↗

Python · Updated Oct 2026

telescopic

Finite-sample MCMC with paired chains and telescoping sums
Inference & sampling
GitHub ↗

Python · Updated Oct 2026

GSPICE

Gaussian Pixelwise Conditional Estimation (GSPICE) for astronomical imaging and spectra
Stellar & GalacticFork
GitHub ↗Docs ↗

Jupyter · Updated Dec 2016

exopop

★ 1
Inferring the population of exoplanets
Scratch & miscFork
GitHub ↗

Python · Updated Aug 2025

arxivy

★ 1 · 21/mo
Helping keep up with the arXiv
Scratch & miscPyPI: arxivy
GitHub ↗

Python · Updated Jun 2026

cd_sbi

★ 1
Confidence Distributions + Simulation-Based Inference
Scratch & misc
GitHub ↗

Jupyter · Updated Apr 2017

PCAT

Probabilistic Cataloging
Scratch & misc
GitHub ↗