Why do planets have magnetic fields?

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

Juno Update: Spacecraft releases first image from Jupiter orbit

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.