One thought on “Jupiter’s Dynamo

  1. I don’t understand the endedness of magnetic fields. In absence of ions that would flow because of the polarity of the field, I don’t think either side would normally be considered emitting or receiving? I mean, if you stuck a bar magnet out in a true endless void, the magnetic field would still exist, but there wouldn’t be such a thing as a flow. If there were such a thing, the field itself should reasonably cease to be fairly quickly.

    I guess what I’m asking is, are the words “emerge” and “return” used purely based on how the field moves other things?

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