The 2 Voyager encounters with Jupiter have been classes exceptional in measure and variety of discovery. We had, or direction, anticipated a couple of discoveries simply because we had by no means earlier than been in a position to learn intimately the atmospheric motions on a planet that could be a massive spinning sphere of hydrogen and helium, nor had we ever saw planet-sized items similar to the Jovian satellites Ganymedes and Callisto, that are part water-ice. We had by no means been so on the subject of a Moon-sized satellite tv for pc corresponding to lo, which was once recognized to be dispersing sodium all through its Jovian local and used to be considered producing a one-million-ampere electric present that during a way ends up in billions of watts of radio emission from Jupiter.
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