Moon
Ganymede
TypeMoon
Mass1.482 × 10²³ kg
Diameter5,268 km
Orbital Radius1.1 million km
Orbital Period7.15 days
Rotation Period171.71 hours
Known Moons0
Surface Gravity1.43 m/s²
Average Temp-163 °C
AtmosphereO2 (thin)
Discovered ByGalileo Galilei
Discovery Year1610
About Ganymede
The largest moon in the solar system, bigger than Mercury. The only moon with its own magnetic field. Has a subsurface ocean sandwiched between ice layers. Surface shows both ancient, cratered terrain and younger, grooved terrain. Has a thin oxygen atmosphere.
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