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Largest moon of Jupiter and in the solar system. Larger than the planet Mercury, though not as massive. Only moon known to generate its own magnetic field. Only body other than Earth known to have plate tectonics.
Ganymede In The News
New Horizons in the News
Ganymede Imaged By New Horizons (May 2007)
Jupiter Ganymede Orbiter (Laplace) in the News
see also Jupiter, Callisto, Europa, Io
About to Choose Between Saturn and Jupiter Missions (Jan 2009)
See Jupiter, Europa, Ganymede, Saturn, Titan, Enceladus
Jupiter Ganymede Orbiter (Laplace) Agreed On (Feb 2009)
Jupiter, Europa, Io, Callisto, Titan, Enceladus
Cooperation Between NASA and ESA (Feb 2011)
Europa, Ganymede, Io, Callisto, Jupiter
Priority Report from the National Research Council (Mar 2011)
Europa, Mars, Uranus
Earth Observations in the News
Amateur Captures Io Eclipse on Ganymede (Aug 2009)