Astronomy Subject Guide

Search and purchase technical reports and standards from the international standards body.

This physical science and technology laboratory is a branch of the U.S. Department of Commerce and publishes standards and technical reports.
NIST also links to a collection of specialized search tools for searching for global standards information.

The International Astronomical Union's SOFA service has the task of establishing and maintaining an accessible and authoritative set of algorithms and procedures that implement standard models used in fundamental astronomy.