Mark Twain (Mercury)

Named after (Samuel Clemens) Twain - American novelist, satirist (1835-1910).

Mark Twain is a crater on Mercury. It has a diameter of 149 kilometers. Mark Twain is named for the American author Mark Twain, who lived from 1835 to 1910. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On Mercury they are named after deceased artists, musicians, painters, and authors who have made outstanding or fundamental contributions to their field and have been recognized as art historically significant figures for more than 50 years.