Mysterious aurora discovered on Saturn

An infrared camera aboard NASA's Cassini spacecraft discovered an aurora lighting up Saturn's polar cap. This mysterious new finding is unlike any other known in our solar system."We've never seen an aurora like this elsewhere," said Tom Stallard, who works with Cassini data at the University of Leicester. "It's not just a ring of aurorae like those we've seen at Jupiter or Earth. This one covers an enormous area across the pole. Our current ideas on what forms Saturn's aurorae predict that this region should be empty, so finding such a bright one here is a fantastic surprise."

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