Galilean Moons of Jupiter - NASA

National Aeronautics and Space Administration Administration 0 300,000,000 900,000,000 1,500,000,000 2,100,000,000 2,700,000,000 3,300,000,000 3,900,000,000 4,500,000,000 5,100,000,000 5,700,000,000 kilometers Galilean Moons of Jupiter The planet Jupiter 's four largest Moons , or satellites, are called wards Jupiter as they orbit, meaning that each moon turns once SIGNIFICANT DATES. the Galilean Moons , after Italian astronomer Galileo Galilei, who on its axis for every orbit around Jupiter . 1610 Galileo Galilei and Simon Marius independently discover observed them in 1610. The German astronomer Simon Marius four Moons orbiting Jupiter . This discovery, among others by Voyagers 1 and 2 offered striking color views and global per- apparently discovered them around the same time. The names Galileo, helped change the way people thought about the heav- spectives from their flybys of the Jupiter system in 1979. From Marius proposed for the Moons in 1614 (suggested to him by a ens.)

structure (as does Earth). Io has a core, and a mantle of partially molten rock, topped by a crust of solid rock coated with sulfur compounds. Both Europa and Ganymede have an iron-rich core, a rock envelope around the core, and an upper layer of water in ice and liquid forms. Like Europa, Ganymede and Callisto have

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  Moon, Core, Jupiter, Ansas, Galilean moons of jupiter, Galilean

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