'''Io''', named for the the daughter of Inachus in [[Greek mythology]], is a moon of [[Jupiter]]. It is the most [[volcano | volcanically]] active object in the [[solar system]]. It has a diameter of about 2,263 miles. | '''Io''', named for the the daughter of Inachus in [[Greek mythology]], is a moon of [[Jupiter]]. It is the most [[volcano | volcanically]] active object in the [[solar system]]. It has a diameter of about 2,263 miles. |