Good morning + happy Friday! It was mentioned some time ago on the Forum that Mark Twain, very appropriately, had an asteroid named after him: 2362 Mark Twain (1976 SH2), see http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2362+Mark+Twain However I did not know that a crater on Mercury was also named for him in the same year (1976). A satellite photo can be seen at http://planetarynames.wr.usgs.gov/Feature/3718?__fsk=-1103551762 Hope you have a great day + weekend, Taylor Roberts