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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 5.4k 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 49 48

Repositories

Showing 10 of 86 repositories
  • 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 4 1 Updated Oct 20, 2026
  • regions Public

    Astropy package for region handling Maintainers: @larrybradley @keflavich

    astropy/regions's past year of commit activity
    Python 66 BSD-3-Clause 65 45 (3 issues need help) 9 Updated Oct 20, 2026
  • photutils Public

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

    astropy/photutils's past year of commit activity
    Python 314 BSD-3-Clause 156 15 1 Updated Oct 20, 2026
  • astropy Public

    Astronomy and astrophysics core library

    astropy/astropy's past year of commit activity
    Python 5,352 BSD-3-Clause 2,215 1,257 125 Updated Oct 20, 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 69 44 37 12 Updated Oct 20, 2026
  • repo_stats Public

    Git and citation stats for your repo and papers

    astropy/repo_stats's past year of commit activity
    Python 5 BSD-3-Clause 5 0 0 Updated Oct 20, 2026
  • astroplan Public

    Observation planning package for astronomers – maintainer @tepickering

    astropy/astroplan's past year of commit activity
    Python 226 BSD-3-Clause 121 50 (4 issues need help) 17 Updated Oct 20, 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 24 5 Updated Oct 19, 2026
  • astroquery Public

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

    astropy/astroquery's past year of commit activity
    Python 798 BSD-3-Clause 457 364 50 Updated Oct 19, 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 24 BSD-3-Clause 18 6 1 Updated Oct 19, 2026