The Tvashtar eruption continues to amaze. All this time between Galileo and New Horizons, Io's volcanoes have probably continually produced spectacular eruptions like these. It boggles the mind, all the activity that goes on in space where no human can see it. New Horizons has now passed Io by; it'll go on erupting, not caring whether anybody's watching or not.
NASA / JHUAPL / SwRI
New Horizons captured this view of a crescent Io on March 1, 2007, 19 hours after its losest approach to Jupiter. The dayside is deliberately overexposed to bring out faint details in the plumes and on the moon's night side. The plume erupting 330 kilome