If you like astronomical complications, and you like them even better wedded to a complication that serves some practical purpose, the Globetrotter is hard to beat
link (I happen to absolutely adore planetarium watches but let's face
link it, knowing when Mars and
link Mercury are in opposition doesn't have a whole heck of a lot to do with the realities of terrestrial life unless you're into astrology). It's a big watch, but hey, it's a big planet.