While we ground pounders were conducting our tedious lives deep in earths gravity well, the Pluto-Kuiper Belt probe “New Horizons” made it’s closest approach to Jupiter on Wednesday, 28 February, 2007. Swinging past this enormous ball of gas for a gravity assist, the probe trained its LORRI imager on the moon Io and caught an amazing picture. The photo shows the volcano Tvashtar ejecting a plume 290 km from the surface.  On the left one can also see a plume of ejecta from the volcano Prometheus.