APOD 1.5

http://apod.nasa.gov/apod/ap100927.html

The natural light displays on Saturn(♄). have been a mystery of Scooby-Doo-like proportions until recently. The composition of Saturn is a core of iron, nickel, silicon and oxygen compounds, surrounded by a deep layer of metallic hydrogen, an intermediate layer of liquid hydrogen and liquid helium, and an outer gaseous layer. Saturn also has 9 rings. So back to the mystery. The spacecraft Cassini-Huygens (currently 1150008km from Saturn as of now) has taken hundreds of infared images of Saturn for other purposes. The strange auroras of Saturn change not only with the angle of the Sun, but also as the planet rotates; they also change with the magnetism of the planet. The false-color image above shows blue reflected sunlight, whilst itself glows red. The purpose of these images is to maybe understand Earth's own auroras a little more.