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