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10:08:09 Satellites of Ice and Rock

10:08:09 Satellites of Ice and Rock - 07:35:00...

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Satellites of Ice and Rock 08/10/2009 07:35:00 The large moons of the Jovian planets Planets: orbit around Sun Moons: orbit around planet Asteroids, comets dwarf planets: smaller objects orbiting the sun The moons of Jupiter more than 60 known moons o a miniature “solar system” The Galilean Moons o Io o Europa  o Ganymede o Callisto What makes Jupiter’s Galilean Moons unusual Io has volcanoes Europa may have an ocean under its ice Ganymede & Callisto may also have sub-surface oceans Callisto Similar in size and mass to our Moon Surface temp - -140C o Appears to be mostly ice Many impact craters Not well differentiated Geologically dead for 4 billion years Ganeymede Fewer impact craters Callisto -> geologically active
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Largest moon in solar system Differentiated o Rock, metal core Mantle, crust made of ice o
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