The innermost moon of Jupiter, Io is a world emblazoned with the reds, yellows, whites and blacks of sulphur chemistry and the scars of active volcanism. Its features have a wide variety of naming themes: gods, goddesses and heroes associated with fire, sun, thunder, and volcanoes; mythical blacksmiths; people associated with the myth of Io ; or people from Dante's Inferno. Names may also be derived from a nearby, more prominent feature; this is a situation where the same name could be used for both a volcano and an adjacent valley.