Ganymede
moon of Jupiter
5.38 AU from Earth
The largest moon in the Solar System, wider than the planet Mercury but with less than half its mass. It is the only moon known to make its own magnetic field, and a salty ocean lies buried under its ice.
- radius 2,631 km · 8% wider than the planet Mercury
- its own magnetic field, found by the Galileo probe in 1996
Numbers that change with time are from 8 November 2026.
open Ganymede in the atlas ›- kind
- place in the Solar System · moon or small world
- distance
- 1,070,412 km from Jupiter
- size
- 5,260 km across
- orbits
- Jupiter