four moons galileo discovered - 960×720
{"Image DocumentName": "Jupiter s Moons Galileo discovered the four largest. Io, Ganymede, and Callisto are larger than our own moon.", "Image ImageDescription": "Europa has a icy crust and is believed to have liquid water oceans below the frozen surface. Io has many active volcanoes. Has 63 moons, most of any planet in our solar system. Ganymede is the largest moon in our solar system.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}