Reference

Grows with the chapters

Reference holds everything you look up rather than read.

What this part of the site will hold

A formula sheet, with each formula linked to the section that derives it.
Constants and data laid out like the IOAA data sheet.
A glossary: tap any underlined term in a section to see its definition now; the full list will be here.
Tables of bright stars, Messier objects and constellations.
Notation, and how to use the allowed calculators (degrees and radians, sexagesimal input).