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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 47 107

  3. astropy-APEs astropy-APEs Public

    A repository storing the Astropy Proposals for Enhancement.

    39 39

  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
  • regions Public

    Astropy package for region handling

    astropy/regions’s past year of commit activity
    Python 65 BSD-3-Clause 58 52 (4 issues need help) 9 Updated Jan 5, 2026
  • photutils Public

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

    astropy/photutils’s past year of commit activity
    Python 289 BSD-3-Clause 145 39 5 Updated Jan 5, 2026
  • pytest-remotedata Public

    Pytest plugin to control whether tests are run that have remote data

    astropy/pytest-remotedata’s past year of commit activity
    Python 23 BSD-3-Clause 17 6 1 Updated Jan 5, 2026
  • sphinx-automodapi Public

    Sphinx extension for generating API documentation

    astropy/sphinx-automodapi’s past year of commit activity
    Python 66 BSD-3-Clause 49 47 (7 issues need help) 0 Updated Jan 5, 2026
  • pytest-astropy Public

    Metapackage for all the testing machinery used by the Astropy Project

    astropy/pytest-astropy’s past year of commit activity
    Python 5 BSD-3-Clause 13 2 0 Updated Jan 5, 2026
  • astropy Public

    Astronomy and astrophysics core library

    astropy/astropy’s past year of commit activity
    Python 4,986 BSD-3-Clause 1,997 1,311 (15 issues need help) 138 Updated Jan 5, 2026
  • asdf-astropy Public

    This is the extension library for ASDF to provide support for Astropy.

    astropy/asdf-astropy’s past year of commit activity
    Python 19 BSD-3-Clause 19 14 4 Updated Jan 5, 2026
  • reproject Public

    Python-based Astronomical image reprojection 🌌 - maintainers @astrofrog @Cadair @svank

    astropy/reproject’s past year of commit activity
    Python 123 BSD-3-Clause 71 69 6 Updated Jan 5, 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 5, 2026
  • 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 7 0 0 Updated Jan 5, 2026