@ Miked
My favorite is Digital Universe. It scales up to a graphics card and an 060 nicely (it needs some accelaration). It implements a comprehensive database using amiga-guide format, one of the best I've seen. There is a yahoo forum dedicated to it. For quick and detailed information, I use this more than any program on any platform.
Distant Suns isn't bad. The author ported to Windows and won't support the original Amiga version anymore. It's menu structure is a bit random, but it is very customizable and has a usable orrery. The paper manual is well written and a nice tutorial of beginning astronomy. Unfortunately, I haven't found a way to move it beyond Hires-laced. It also doesn't like my 060 and harddrive combination, it will run directly fron CD though. It will run on 68000 @ 7 Mhz, but likes more speed.
There are very basic offings on Aminet. Simple stuff.
I tried Digital Almanac. It's big. The 2 programs above answer most questions and explore very well.
At star parties I use a Palm running Planetarium.
Useful Astronomy software (telescope to eyepiece calculaters for example) aren't too hard to write. Its a shame there aren't more for our platform.
