Neptune's magnetic field is likely generated by a conducting fluid mantle rather than its core.

Question

Quizplus · Accepted Answer

Neptune's magnetic field is thought to be generated by motions within the planet's mantle, which is composed of a hot, dense fluid of 'icy' materials (water, methane, and ammonia), rather than by a metallic core like Earth's. This fluid conducts electricity and, through its motion, generates the planet's magnetic field.

Neptune's Magnetic Field Is Likely Generated by a Conducting Fluid