Mercury’s Caloris impact basin

Mercury’s Caloris impact basin

Fig. 2.22 . This false-color image shows Mercury’s great Caloris impact basin as a large, circular orange feature in the center of the image. It was acquired on 14 January 2008 from the MESSENGER spacecraft. The smaller, bright orange spots just inside the rim of Caloris basin are thought to mark the location of volcanic features. The color variations in the surrounding plains indicate Mercury’s variable surface composition. (Courtesy of NASA/JHUAPL/ASU/CIW/Science/AAAS.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University