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The Astropy Project

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The Astropy Project is a community effort to develop a core package for astronomy using the Python programming language and improve usability, interoperability, and collaboration between astronomy Python packages. The core astropy package contains functionality aimed at professional astronomers and astrophysicists, but may be useful to anyone developing astronomy software. The Astropy Project also includes "affiliated packages," Python packages that are not necessarily developed by the core development team, but share the goals of Astropy, and often build from the core package's code and infrastructure.

Aside from the actual code, Astropy is also a community of astronomy-associated users and developers that agree that sharing utilities is healthy for the community and the science it produces. This community is of course central to accomplishing anything with the code itself. We welcome anyone who wishes to contribute to the project and expect everyone in our community to follow the code of conduct when interacting with others.

For more details on background of the project, you can read the original vision from when the project was founded.

For more details, please visit https://www.astropy.org

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  1. astropy astropy Public

    Astronomy and astrophysics core library

    Python 5k 2k

  2. astropy.github.com astropy.github.com Public

    The Astropy web pages

    HTML 47 106

  3. astropy-APEs astropy-APEs Public

    A repository storing the Astropy Proposals for Enhancement.

    40 41

  4. astropy-project astropy-project Public

    Documents and policies regarding the Astropy Project as a whole.

    TeX 42 46

Repositories

Showing 10 of 87 repositories
  • repo_stats Public

    Git and citation stats for your repo and papers

    astropy/repo_stats’s past year of commit activity
    Python 4 BSD-3-Clause 6 0 0 Updated Jan 30, 2026
  • photutils Public

    Astropy package for source detection and photometry. Maintainer: @larrybradley

    astropy/photutils’s past year of commit activity
    Python 288 BSD-3-Clause 146 39 5 Updated Jan 29, 2026
  • SPISEA Public

    Stellar Population Synthesis Modeling

    astropy/SPISEA’s past year of commit activity
    Python 69 38 14 10 Updated Jan 29, 2026
  • specutils Public

    An Astropy coordinated package for astronomical spectroscopy. Maintainers: @rosteen @keflavich @eteq

    astropy/specutils’s past year of commit activity
    Python 195 132 199 14 Updated Jan 29, 2026
  • extension-helpers Public

    Helpers to assist with building Python packages with compiled C/Cython extensions

    astropy/extension-helpers’s past year of commit activity
    Python 17 BSD-3-Clause 13 5 (2 issues need help) 4 Updated Jan 29, 2026
  • specreduce Public

    Tools for the reduction of spectroscopic observations from Optical and NIR instruments

    astropy/specreduce’s past year of commit activity
    Jupyter Notebook 67 41 55 9 Updated Jan 28, 2026
  • astropy Public

    Astronomy and astrophysics core library

    astropy/astropy’s past year of commit activity
    Python 5,028 BSD-3-Clause 2,017 1,310 (14 issues need help) 146 Updated Jan 28, 2026
  • astroquery Public

    Functions and classes to access online data resources. Maintainers: @keflavich and @bsipocz and @ceb8

    astropy/astroquery’s past year of commit activity
    Python 769 BSD-3-Clause 429 365 39 Updated Jan 27, 2026
  • astropy-APEs Public

    A repository storing the Astropy Proposals for Enhancement.

    astropy/astropy-APEs’s past year of commit activity
    40 41 8 7 Updated Jan 27, 2026
  • halotools Public

    Python package for studying large scale structure, cosmology, and galaxy evolution using N-body simulations and halo models

    astropy/halotools’s past year of commit activity
    Python 117 BSD-3-Clause 68 61 3 Updated Jan 26, 2026

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