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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
  • photutils Public

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

    astropy/photutils’s past year of commit activity
    Python 288 BSD-3-Clause 147 39 7 Updated Feb 6, 2026
  • astropy Public

    Astronomy and astrophysics core library

    astropy/astropy’s past year of commit activity
    Python 5,040 BSD-3-Clause 2,022 1,309 (14 issues need help) 147 Updated Feb 6, 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 12 3 Updated Feb 6, 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 Feb 6, 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 13 Updated Feb 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 14 5 (2 issues need help) 4 Updated Feb 5, 2026
  • pyvo Public

    An Astropy affiliated package providing access to remote data and services of the Virtual Observatory (VO) using Python.

    astropy/pyvo’s past year of commit activity
    Python 83 BSD-3-Clause 55 71 4 Updated Feb 4, 2026
  • astropy.github.com Public

    The Astropy web pages

    astropy/astropy.github.com’s past year of commit activity
    HTML 47 BSD-3-Clause 106 25 6 Updated Feb 4, 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 429 366 39 Updated Feb 4, 2026
  • SPISEA Public

    Stellar Population Synthesis Modeling

    astropy/SPISEA’s past year of commit activity
    Python 69 38 14 9 Updated Feb 4, 2026