# astropy.units — Reference

This file is a placeholder for the extended `astropy.units` reference promised in the skill workflow.

For comprehensive documentation, unit systems, equivalencies, performance optimization, and unit arithmetic, see the upstream astropy docs:

- https://docs.astropy.org/en/stable/units/
- https://docs.astropy.org/en/stable/units/equivalencies.html
- https://docs.astropy.org/en/stable/units/standards.html