This image, from NASA Mariner 10 spacecraft which launched in 1974, is of the northern half of Mercury Shakespeare Quadrangle. http://photojournal.jpl.nasa.gov/catalog/PIA00066
This image, from NASA Mariner 10 spacecraft which launched in 1974, is of the northern half of Mercury Shakespeare Quadrangle. http://photojournal.jpl.nasa.gov/catalog/PIA00066