As a newbie getting into astrophotography being confused by all these new terms, this glossary is a great idea.
I have some more terms that aren't on that list that I don't fully understand, although some I do but weren't on the list, and think it'd help others if they are added. Mainly equipment type terms, some are commonly used abbreviations here:
focal reducer
field flattener
guide scope
dew heater
guide cam
goto
SCT
ED
APO
HST
ISS
DSO
first light
piggyback
sub (sub exposures)
dark frame
stacking
That's all I can think of at the moment. I know many of these terms are obvious to you guys, but to a newbie I either didn't know and had to search, or had to think a little harder than normal to figure them out.
