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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 5.1k 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 42

  4. astropy-project astropy-project Public

    Documents and policies regarding the Astropy Project as a whole.

    TeX 44 46

Repositories

Showing 10 of 87 repositories
  • photutils Public

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

    astropy/photutils’s past year of commit activity
    Python 291 BSD-3-Clause 148 37 4 Updated Mar 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 6 0 0 Updated Mar 4, 2026
  • astropy Public

    Astronomy and astrophysics core library

    astropy/astropy’s past year of commit activity
    Python 5,058 BSD-3-Clause 2,041 1,306 (12 issues need help) 140 Updated Mar 4, 2026
  • astropy-figure-tests Public

    Truth images for visualization tests in CircleCI

    astropy/astropy-figure-tests’s past year of commit activity
    1 BSD-3-Clause 4 0 0 Updated Mar 3, 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 Mar 2, 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 13 3 Updated Mar 2, 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 5 (2 issues need help) 4 Updated Mar 2, 2026
  • reproject Public

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

    astropy/reproject’s past year of commit activity
    Python 124 BSD-3-Clause 70 71 8 Updated Mar 2, 2026
  • astropy-sphinx-theme Public

    Standalone version of the Astropy sphinx theme

    astropy/astropy-sphinx-theme’s past year of commit activity
    JavaScript 5 BSD-3-Clause 20 14 (2 issues need help) 3 Updated Mar 2, 2026
  • regions Public

    Astropy package for region handling Maintainers: @larrybradley @keflavich

    astropy/regions’s past year of commit activity
    Python 65 BSD-3-Clause 57 51 (4 issues need help) 9 Updated Mar 2, 2026