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🌊 Ganymede
Ganymede Moon

Ganymede: Subsurface ocean moon of Jupiter

Ganymede is the largest moon, and one of the four Galilean moons of the planet Jupiter. Ganymede is larger than the planets Mercury and Pluto, and 2/3 the size of Mars. It would be considered a planet if it were orbiting the Sun instead of Jupiter.

Ganymede is the only mooon in the solar system to possess a magnetic field, has a tenuous oxygen atmosphere, and is believed to have 6 times the water on Earth in the form of several subsurface saltwater oceans sandwiched between layers of ice.

Ganymede, along with Callisto, Europa, and Io, (the Galilean moons) were discovered by the Italian astronomer Galileo Galilei in 1610.

For a listing of all moons, see Moons of the Planets.

Ganymede Facts
      1. Mass (kg)
      2. 1.48 x 1023
      1. Radius (km)
      2. 2,631
      1. Density (gm/cm3)
      2. 1.94
      1. Distance from planet (km)
      2. 1,070,000
      1. Rotational period (days)
      2. 7.154553
      1. Orbital period (days)
      2. 7.154553
      1. Orbital velocity (km/sec)
      2. 10.88
      1. Eccentricity of orbit
      2. 0.002
      1. Inclination of orbit (°)
      2. 0.195
      1. Albedo
      2. 0.42
      1. Magnitude (Vo)
      2. 4.61
      1. Atmosphere
      2. trace oxygen

    Ganymede Surface Map

    Ganymede moon surface map