Jupiter's magnetosphere

Jupiter’s surrounding magnetic field forms the largest structure in the Solar System, nearly 15 times bigger than the Sun. If it were visible to the naked eye it would appear larger than the full Moon in the night sky. And, in the same way that Earth’s magnetosphere traps belts of radioactive particles – the Van Allen Belts – Jupiter has its own equivalent radiation belts around it, except these are thousands of times more intense than those surrounding our homeworld.