http://www.newsweek.com/jupiter-moons-aurora-vortices-1010079

Shimmering tendrils of colored light dance above the poles of our planet. Look at the skies from far enough north or south, and you may well catch a glimpse of the dazzling displays. But Earth isn’t the only place to watch these mesmerising auroras.

Scientists probing the auroras of Jupiter have uncovered some weird and wonderful quirks. The gas giant’s moons, the researchers wrote in a paper published by the journal Science, leave “footprints” on the planet’s auroras, like twisting trails of violent vortices that sometimes fork in two.