Great to have you here Phil!
(Paul, aka 1ponders, whom you met back up this thread, also bought a pair of those wonderful 20x80 bino's after hearing me spruke on about how good they were. Bloody good, aren't they?
)
One of the best "Astro" things Phil (aka Dog Star) and Don and I ever did was to charter a helicopter and go for a flight around and over the Gosses Bluff comet impact crater. The central "dimple" is pretty much all that remains clearly visible, and that's a ring of hills about 5km's across. A few days earlier we had driven the long and dusty road and toured it at ground level, but you really can't appreciate it until you've seen it from the air!
This was back in '99 after both my brothers had moved to the Alice from Brisbane, and I was traveling Central Oz and spent a few weeks visiting them.
Good times!!!
http://en.wikipedia.org/wiki/Gosses_Bluff_crater