Transcription: I'm a geologist and of all the worlds in the solar system, the ones that excite me most are some of the large satellites of the outer planets. The outer layers of most of them are ice rather than ordinary rock but that doesn't matter because in all important respects the ice behaves exactly like rock. I'm only able to take such an interest in these satellites because of spacecraft that have visited them, notably the two voyages probes that explored the planets and their satellites from Jupiter out to Neptune between 1979 and 1989. There were lots of instruments on board the Voyager probes, suc ...
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