How has Galileo enhanced what scientists got back from the two Voyager spacecraft flybys of Europa in the late 1979?
The best imaging resolution from the Voyager spacecraft was about 2 km per pixel. Now we see down to 6 meters per pixel! We had little clue before of even the range of surface features on Europa. Now we know the detailed morphologies of Europan features and their geographical distributions. Plus other Galileo instruments have provided critical information as to the composition, magnetic field, and thermal properties of Europa. From Voyager, there was a hint of the range of features on the surface and how they formed, that the surface might be young (few large craters), and that there may be a subsurface ocean. With the detail provided by Galileo, all of these things seem more certain today.
