This is a drawing of the interior of Europa.
Click on image for full size
Interior of Europa
The diagram to the left shows the possible interior of Europa. The composition of the icy moons is mostly ice, therefore there is probably a small core of rocky material buried inside, covered with ice.
The diagram shows that there may be an ocean of water beneath the surface crust of ice on Europa. If the temperature inside Europa is just right, then there might be water inside. Such an environment might prove to be suitable for life.
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