An image of Europa's surface, showing many features indicating the presence of a submerged ocean
Click on image for full size
Image courtesy of NASA
Does Europa Have an Ocean?
The surface of Europa shows many signs of that there may be an ocean under the surface:
* flooded terrain
* 'mushy' craters
* spreading centers
Taken together, these pieces of evidence make it virtually certain that there is an ocean under the icy surface of Europa.
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