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Galilean Moon’s

By: Kierra Jackson. Galilean Moon’s. About the 4 moon’s. The moon’s.

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Galilean Moon’s

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  1. By: Kierra Jackson Galilean Moon’s

  2. About the 4 moon’s The moon’s The Galilean moons are the four moons of Jupiter discovered by Galileo Galilei. They are the largest of the many moons of Jupiter and have been named Io,Europa,Ganymede, and Callisto. Ganymede, Europa and Io participate in a 1:2:4 orbital resonance. They are among the most massive objects in the Solar System outside the Sun and the eight planets, with radii larger than those of the dwarf planets.

  3. All four moons are composed of a mixture of rock and ice, which varies according to their distance from Jupiter. The closest, Io, is mostly metals and silicate rock; the next, Europa, is about 90% silicates and 10% water ice; the third and largest, Ganymede, is 60% rock and 40% ice; and the outermost, Callisto, is about 50% rock and 50% ice (Anderson et al. 1996, 1997; Canup & Ward 2002). This distribution implies that the accretion disk around Jupiter was cool at the outer edge but hot near the planet when the Galilean satellites formed. In the inner, hotter region of the disk, mostly silicates were available, while in the cool outer region water ice was abundant (Canup & Ward 2002, Alibert et al. 2005c). Info about the moon’s

  4. Ganymede • Ganymede is the largest and heaviest moon in the Solar System, surpassing even the planet Mercury in diameter, though not in mass. It has a strongly differentiated composition, with a molten core of iron or iron alloys, an intermediate mantle of silicate rocks, and a surface layer of water ice about 500 miles (800 km) in thickness (Anderson et al. 1996). Ganymede has a trace atmosphere of oxygen but no observable weather patterns.

  5. Lo • Io is a rocky object more similar in composition to the terrestrial planets than to the icy moons of the four giant planets. Its interior is differentiated into a molten iron core surrounded by a mantle of silicate rocks. Gravitational stresses generated by the opposing perturbations of Jupiter and the other Galilean moons make Io one of the most volcanic environments in the Solar System. Its terrain has been continually resurfaced by lava flows over billions of years. Impact craters such as those observed on Mars, the Moon, and other giant planet satellites are not visible, having been buried by magma.

  6. Europa • Europa contains a metallic core, an extensive rocky mantle, and a relatively thin crust of water ice. Its surface is extremely flat, without craters or mountains; the only notable feature is a network of dark cracks. This terrain is interpreted as a smooth shell of ice, and it is often speculated – though far from proven – that a global ocean of liquid water is concealed underneath.

  7. Callisto • Callisto consists of a mixture of rock and ice in proportions not too different from those observed in Ganymede. However, measurements by the Galileo spacecraft establish that Callisto's interior is almost completely undifferentiated, in strong contrast to the layer-cake construction of Ganymede (Anderson et al. 1997). Callisto has no metallic core, no magnetic field, and no plate tectonics. It is also the least reflective of the Galilean moons, suggesting that its icy terrain includes substantial dust.

  8. Thank’s for watching

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