False-color ultraviolet image of Saturn's aurorae, showing pole-encircling rings of red (atomic hydrogen) and white (hydrogen molecules) emissions towering above the cloud tops. Captured by the Hubble Space Telescope, this image reveals surprising results about Saturn's auroral activity compared to Earth's.

Astronomy Picture from 19/02/2005

Saturnian Aurora

Source: https://apod.nasa.gov/apod/ap050219.html


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