Foodstick.... This is indeed an interesting question. I sent an email to Robert Nemiroff who runs the astronomy site,
http://apod.nasa.gov/apod/astropix.html . He responded and suggested I post the question at a discussion forum there so I did and it is running now at Starship Asterisk. Looks like an interesting discussion group! Check it out at
http://bb.nightskylive.net/asterisk/...p?f=30&t=22868