astropy

SKILL.md

Astropy

Overview

Astropy is the core Python package for astronomy, providing essential functionality for astronomical research and data analysis. Use astropy for coordinate transformations, unit and quantity calculations, FITS file operations, cosmological calculations, precise time handling, tabular data manipulation, and astronomical image processing.

When to Use This Skill

Use astropy when tasks involve:

Converting between celestial coordinate systems (ICRS, Galactic, FK5, AltAz, etc.)

Working with physical units and quantities (converting Jy to mJy, parsecs to km, etc.)

Reading, writing, or manipulating FITS files (images or tables)

Cosmological calculations (luminosity distance, lookback time, Hubble parameter)

Precise time handling with different time scales (UTC, TAI, TT, TDB) and formats (JD, MJD, ISO)

Table operations (reading catalogs, cross-matching, filtering, joining)

WCS transformations between pixel and world coordinates

Astronomical constants and calculations

Quick Start