New Horizons Image of Volcanic Eruption on Io

Io

Io is the most volcanically active object in our solar system. Three volcanoes were erupting as New Horizons flew by in 2007.The huge plume of a volcano gushes 180 miles (290 kilometers) upward near the north pole. Smaller plumes can be seen on the left horizon and as a bright spot near the south pole.