Word: soderblom
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Dates: during 1970-1979
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...spectacular of the Galilean moons. Four months ago, Voyager 1 had spotted eight volcanoes in the midst of eruption, the first time such activity was observed other than on earth. Last week its successor photographed six of the same eruptions, suggesting to the U.S. Geological Survey's Laurence Soderblom that they may "last for several years...
...small planets, but appeared as little more than fuzzy blobs in earth-bound telescopes. Now, Voyager's cameras have found that these moons are not only complex but also markedly different, their surfaces varying greatly in age, composition and appearance. Observed the U.S. Geological Survey's Laurence Soderblom: "There is no such thing as a boring Galilean moon...
Neighboring Ganymede, like Callisto, is at least half composed of water and ice. It shows sinuous ridges and crisscrossing fractures that look like earthly fault lines-possibly caused by what Soderblom calls "water quakes." Ganymede's surface is less cratered than Callisto's and only a fourth its age, about 1 billion years...