Ganymede, the seventh moon of Jupiter. It is the largest moon of Jupiter and in the solar system. Ganymede has a diameter of miles kilometers), larger than the planet Mercury. It is the only moon known to have a magnetic field.
Io: The Prometheus Plume Credit: Galileo Project, JPL, NASA Two sulfurous eruptions r visible on Jupiter's volcanic moon Io in this color composite image from the robotic Galileo spacecraft that orbited Jupiter from 1995 to @ the image top, over
Jupiter Moons - Callisto discovered by Galileo Galilei in 1610 using a telescope. It is thought to have oceans of liquid water beneath its crust. about the size of Mercury, is the largest moon in the solar system. It is more heavily cratered than any
This "family portrait" is a composite of the Jovian system: the edge of Jupiter with its Great Red Spot + Jupiter's 4 largest moons, known as the Galilean satellites. The moons (top-to-bottom): Io, Europa, Ganymede and Callisto.
Gliding past Jupiter at the turn of the millennium, the Cassini spacecraft captured this awe inspiring view of active Io with the largest gas giant as a backdrop, offering a stunning demonstration of the ruling planet's relative size
'Drumbeat is getting louder' for a mission to Jupiter's moon after a water geyser hints at life under oceans of ice. Water and organic chemicals make Jupiter's tiny moon the most exciting destination in the solar system.