Europa, 2nd Galilean moon of Jupiter.
Under the icy crust lies a vast ocean which may be the abode of life.
Map credits:
- https://www.planetary.org/space-images/color-global-map-of-europa
- https://creativecommons.org/licenses/by-nc-nd/3.0/
- Images: NASA/JPL/PDS
- Image processing: Björn Jónsson