Mercury - MESSENGER
Two frame MDIS Wide-Angle Camera mosaic of a horn of Mercury's crescent, taken from an altitude of 4200 km. This captures a portion of Mercury's south polar region. Near the bottom are ridged plains. The ringed basin at top center is the 225 km diameter crater Bach. The crater to its immediate left is Wagner.
Image Credit: NASA / JHUAPL / Carnegie Institute of Washington / Justin Cowart