"Iron Snowstorms Inside Ganymede May Unlock Secrets of Its Magnetic Mysteries"
Researchers have conducted an experimental study to understand Ganymede's strong magnetic field, testing the 'iron snow' theory which suggests iron crystallizes and falls within the moon's core, similar to a snowglobe. The laboratory experiment used water ice to simulate iron snow crystals and found that crystallization occurs in sporadic bursts when the liquid reaches a supercooled state. This process could explain the dynamic nature of Ganymede's magnetic field and may also apply to other small planetary bodies in the solar system. Earth's core, however, operates differently due to its powerful gravity and material composition.