Why does Saturn have red auroras?

Auroras are caused by charged particles streaming along the magnetic field lines of a planet into its atmosphere. Particles from the sun cause Earth's auroras. Many, but not all, of the auroras at Jupiter and Saturn are caused by particles trapped within the magnetic environments of those planets. read more

Researchers have confirmed that Saturn’s auroral displays stem from the same cause as auroras on Earth. They are caused by the dramatic collapse of the planet’s magnetic tail. Just like comets, planets such as Saturn and the Earth have a tail – known as the magnetotail – that is made up of electrified gas from the sun. read more