Io is the most volcanically active body in the Solar System. Volcanoes erupt massive volumes of silicate lava, sulphur and sulphur dioxide, constantly changing Io's appearance. This new basemap of Jupiter's moon Io was produced by combining the best images from both the Voyager 1 and Galileo Missions. To try to describe this photo in an Instagram caption is a mindbender. Learn more on the NASA Commons #Flickr site: flickr.com/photos/nasacommons/5278071978 Haooy #spaceSaturday folks! Credit: NASA #NASA #Jupiter #solarsystem #mosaic