Glossary of astronomical terms
Click here to enter the glossary.
WARNING: The glossary found at the above link was generated from one supplied with Guide 7.0. It provides some pretty good definitions for terms that cropped up in that program; whenever I used a term that your average citizen might not know, I linked it to a glossary definition. Because I wasn't thinking in terms of an on-line glossary at the time, it includes a lot of text specific only to Guide, such as descriptions of how to get assorted jobs done and what various menus do; and it lacks a lot of interesting stuff not relevant to Guide, such as info about various types of telescopes and observing gear. But it does have a lot of information useful in general astronomy, too.