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High Resolution image of Europa
This is one of the highest resolution images of Europa obtained by Voyager 2. It shows the smoothness of most of the terrain and the near absence of impact craters. Only three craters larger than 5 km in diameter have been found.
Jupiter: Moons: Europa

Europa [yur-ROH-pah] is a strange looking moon of Jupiter with a large number of intersecting features. It is unlike Callisto and Ganymede with their heavily cratered crusts. Europa has almost a complete absence of craters as well as almost no vertical relief. As one scientist put it, the features "might have been painted on with a felt marker". There is a possibility that Europa may be internally active due to tidal heating at a level one-tenth or less that of Io. Models of Europa's interior show that beneath a thin 5 km (3 miles) crust of water ice, Europa may have oceans as deep as 50 km (30 miles) or more. The visible markings on Europa could be a result of global expansion where the crust could have fractured, filled with water and froze.

Copyright © 1997-1999 by Calvin J. Hamilton.
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Just the Facts
Distance from Jupiter: 
671,000 km
Equatorial Radius: 
1,565 km
Mass: 
47,998,200,000,000,000,000,000 kg
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Jupiter's Moons
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