EXPLORING THE JUPITER SYSTEM
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Jupiter's moon Ganymede: The Largest Has Its Own Magnetic Field
Ganymede — the largest moon of Jupiter and, in fact, the largest moon in the Solar System — has its own magnetic field. Internal tidal friction has some surprising effects on the big moon.

The Galileo spacecraft exploring the area around Jupiter revealed that Ganymede has its own magnetic field. The stirring of its molten core of iron sulfide may have generated the magnetic field. Perhaps having been in a slightly different orbit in its past, enough heat from tidal friction may have caused a separation of material inside Ganymede.

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Jupiter's Known Satellites The Jupiter Satellite Page New Moons of Jupiter Discovered in 2003 Outer Moons Discovered At Jupiter in 2002 Eleven Moons Discovered in 2002 Eleven Moons Discovered 2000 Names for Moons Discovered in 2000 Moon Rediscovered After 25 Years Galileo and its discoveries [NASA JPL] Jupiter Home Page [NASA Goddard] Jupiter Fact Sheet [NASA Goddard] Directory of Planetary Fact Sheets [NASA Goddard] NSSDC Planetary Home Page [NASA Goddard] Jovian satellite fact sheet [NASA Goddard]			Galilean Satellite Fact Table [NASA Goddard] Jupiter's Known Satellites [Univ of Hawaii] The Jupiter Satellite Page [Univ of Hawaii] New Moons of Jupiter Discovered in 2003 [Univ of Hawaii] Outer Moons Discovered At Jupiter in 2002 [Univ of Hawaii] Eleven Moons Discovered in 2002 [Univ of Hawaii] Eleven Moons Discovered 2000 [Univ of Hawaii] Names for Moons Discovered in 2000 [Univ of Hawaii] Moon Rediscovered After 25 Years [Univ of Hawaii] Europa facts and pics [SEDS Nine Planets] Galileo Project Home [NASA JPL] Where is Galileo now? [NASA JPL] Interactive guide to volcanoes on Io Exploring Jupiter main page [STO] Internet Resources [STO]

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