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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 5.3k 2.2k

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

    The Astropy web pages

    Python 47 107

  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 48 48

Repositories

Showing 10 of 86 repositories
  • regions Public

    Astropy package for region handling Maintainers: @larrybradley @keflavich

    astropy/regions's past year of commit activity
    Python 65 BSD-3-Clause 64 46 (3 issues need help) 10 Updated Sep 16, 2026
  • photutils Public

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

    astropy/photutils's past year of commit activity
    Python 308 BSD-3-Clause 156 18 1 Updated Sep 15, 2026
  • astropy Public

    Astronomy and astrophysics core library

    astropy/astropy's past year of commit activity
    Python 5,305 BSD-3-Clause 2,167 1,294 135 Updated Sep 15, 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 14 7 (2 issues need help) 3 Updated Sep 15, 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 5 0 0 Updated Sep 15, 2026
  • ccdproc Public

    Astropy affiliated package for reducing optical/IR CCD data

    astropy/ccdproc's past year of commit activity
    Python 93 BSD-3-Clause 92 81 7 Updated Sep 14, 2026
  • astrowidgets Public

    *PRE-ALPHA*/heavy dev. Jupyter widgets leveraging the Astropy ecosystem

    astropy/astrowidgets's past year of commit activity
    Python 34 BSD-3-Clause 19 15 2 Updated Sep 14, 2026
  • astropy-iers-data Public

    IERS data maintained by @astrofrog and astropy.utils.iers maintainers

    astropy/astropy-iers-data's past year of commit activity
    Python 3 BSD-3-Clause 9 6 6 Updated Sep 13, 2026
  • astropy-integration-testing Public

    Regular integration tests of Coordinated packages with astropy

    astropy/astropy-integration-testing's past year of commit activity
    Python 4 6 4 2 Updated Sep 13, 2026
  • astropy.github.com Public

    The Astropy web pages

    astropy/astropy.github.com's past year of commit activity
    Python 47 BSD-3-Clause 107 23 4 Updated Sep 11, 2026