AI Insight
A new theoretical model has been proposed to explain how Ganymede, Jupiter's largest moon, developed and maintained a molten metallic core. This internal melting process is understood to be the origin of Ganymede's magnetic field, which makes it the only moon in the solar system known to generate its own magnetosphere. The model addresses a long-standing question about the thermal and geological history of this icy moon.
Why it matters
Understanding how small planetary bodies like Ganymede can sustain molten cores and magnetic fields informs broader models of planetary formation and interior dynamics across the solar system. It also has implications for evaluating the habitability potential of icy moons, including those orbiting other planets.
A new model explains how Ganymede got its molten core — which in turn has given Jupiter’s largest moon its magnetic field.
The post How Jupiter’s Moon Ganymede Melted Its Core appeared first on Sky & Telescope.