A Ghost Story
MESSENGER images are enabling the story of Mercury's geologic history to be told. In this scene, there was once a crater that resembled the one in the upper right. Then, volcanic lava flooded the surface, burying the crater and leaving just an outline of the crater's rim, now seen as the "ghost crater" located in the lower left of this image. After extensive flooding in Mercury's north, additional cosmic bodies impacted Mercury's surface, creating the various sized craters seen here.
Date acquired: August 14, 2011
Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington