# astropy/astropy

Astronomy and astrophysics core library

Repository: https://github.com/astropy/astropy
Canonical: https://ross.abutalabs.com/products/astropy
Homepage: https://www.astropy.org
Language: Python
License: BSD-3-Clause
License Family: permissive
Topics: python, astronomy, science, astrophysics, astropy
Last push: 2026-08-26T17:50:54+00:00

## Health v2 (maintenance only)
Score: 97/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 92, longevity 100
- inputs: {"age_days": 5523, "days_push": 7, "days_rel": 56, "gap_med": 17.0, "n_releases_24m": 13}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5286, forks 2155 (observed 2026-08-28T04:09:14.203674+00:00)

## What it is
Astropy is the core Python package of the Astropy Project, providing commonly used tools for astronomy and astrophysics such as units, coordinates, time handling, and FITS file I/O. It serves as the foundation for an ecosystem of affiliated astronomy packages.

## Use cases
- convert between astronomical coordinate systems in python
- read and write FITS files
- work with physical units and constants in scientific code
- handle astronomical time scales and epochs
- analyze telescope observation data
- compute sky positions of celestial objects

## When to choose
- you are doing astronomy or astrophysics research in Python
- you need standardized units, coordinates, or time handling for scientific data
- you want a well-maintained, community-supported scientific library with BSD licensing

## When to avoid
- your project has nothing to do with astronomy or space science
- you need a general-purpose numerical library like NumPy or SciPy instead

## Facets
- artifact type: library
- maturity: stable
- function: data-science, math, sdk
- domain: astronomy, data-science
- platform: python, cross-platform
- tags: astrophysics, astronomy, scientific-computing, units, coordinates, fits, time, algorithms

## Member repositories
- astropy/astropy (main) score 97

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:14.203674+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:59:15.531562+00:00, confidence not recorded.
  - readme: https://github.com/astropy/astropy (fetched 2026-08-28T04:09:14.203674+00:00, sha fd23d85aaa52)
  - homepage: https://www.astropy.org (fetched 2026-08-29T08:55:37.950737+00:00, sha 0d8d7cdd3714)
  - site_page: https://www.astropy.org/about.html (fetched 2026-08-29T08:55:37.959772+00:00, sha a90487721c39)
- Data as of 2026-08-30T08:39:29.467469+00:00.