How do swirling liquids in a planet’s core help create a protective magnetosphere?

How do swirling liquids in a planet’s core help create a protective magnetosphere?
The JunoCam camera aboard NASA’s mission is operational and sending down data
The craft has made it to the planet’s magnetosphere, where the movement of particles in space is controlled by what’s going on inside the gas giant
Neptune’s magnetic field could help us to improve our ability to forecast space weather events such as solar storms
They’re not just on Earth, you know. Read on to find out how auroras form on different planets in the Solar System.