... Credit: Mike Salway Explanation: South is toward the top in this frame from a stunning movie featuring Jupiter and moons recorded last Thursday from the Central Coast of New South Wales, Australia. ... In the early frame above, Ganymede , the largest moon in the solar system, is off the lower right limb of the planet, while intriguing Europa is visible against Jupiter's cloud tops, also near the lower right. ... Also finally erupting into view at the right, is Jupiter's volcanic moon, Io . ...