Coronae are oval features of uncertain origin, named for fertility and earth goddesses.Valles, valleys, are named according to their length: if more than 400 km, after the word for the planet in various world languages, otherwise after river goddesses.[2][3] Craters on Venus that have diameters less than 20 km are named with common female first names:[2] 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.[2][3] The largest moon of Saturn is a world in its own right: Titan has a dense atmosphere and complex weather system, with liquid-carved river networks and sizable seas.[2][3] Neptune's largest moon is thought to be a captured Kuiper belt object, an interloper from further out in the Solar System.
Highest resolution images of Tawhaki Patera, taken by the
Galileo
spacecraft
. Color image on the left acquired in July 1999. The gray scale image on the right taken in November 1999.