Mark Twain is a crater on Mercury.
It has a diameter of 149 kilometers.
Its name was adopted by the International Astronomical Union (IAU) in 1976.
Mark Twain is named for the American author Mark Twain, who lived from 1835 to 1910.

Mark Twain is one of many Peak-ring basins on Mercury.
Mark Twain is a crater on Mercury. It has a diameter of 149 kilometers. Its name was adopted by the International Astronomical Union (IAU) in 1976. Mark Twain is named for the American author Mark Twain, who lived from 1835 to 1910.
Mark Twain is one of many Peak-ring basins on Mercury.
Mark Twain (crater)