I just hit 10,000 doing one of the 'famous explorers' passenger missions. During this trip I learned two things (a) Y Canum Ven, the Red Carbon tourist spot it pretty neat, and (b) passengers don't like it when you crash into the back of a station at the end of the return trip and drop hull integrity to 17%. The first one I figured, but the second... who knew?
(Grr, its not letting me upload an image. Ah well.)