User Guide

Data structures and transformations

• Constants (astropy.constants)
• Units and Quantities (astropy.units)
• N-Dimensional Datasets (astropy.nddata)
• Data Tables (astropy.table)
• Time and Dates (astropy.time)
• Time Series (astropy.timeseries)
• Astronomical Coordinate Systems (astropy.coordinates)
• World Coordinate System (astropy.wcs)
• Models and Fitting (astropy.modeling)
• Uncertainties and Distributions (astropy.uncertainty)

File I/O

• Overview of Astropy File I/O
• High-level Unified File I/O
  • Image Data
  • Table Data

• FITS File Handling (astropy.io.fits)
• Text Tables (astropy.io.ascii)
• VOTable Handling (astropy.io.votable)
• ECVS, HDF5, Parquet, PyArrow CSV, YAML (astropy.io.misc)

Computations and utilities

• Cosmological Calculations (astropy.cosmology)
• Convolution and Filtering (astropy.convolution)
• IERS data access (astropy.utils.iers)
• Data Visualization (astropy.visualization)
• Astrostatistics Tools (astropy.stats)
• Masked Values and Quantities (astropy.utils.masked)
• SAMP (Simple Application Messaging Protocol) (astropy.samp)

Nuts and bolts

• Configuration System (astropy.config)
• I/O Registry (astropy.io.registry)
• I/O Typing (astropy.io.typing)
• Logging system
• Python warnings system
• Astropy Core Package Utilities (astropy.utils)
• Environment variables
• Astropy Glossary