Image acquired by Cassini's VIMS instrument on October 29, 2006 shows a 'hexagon-like' atmospheric vortex. This image is the first to capture the entire feature and north polar region in one shot, and is also the first polar view using Saturn's thermal glow at 5 microns as the light source. To see the deep atmosphere at night, the infrared instrument images the thermal glow radiating from Saturn's depths. Clouds at depths about 75 kilometres lower than the clouds seen at visible wavelengths block this light, appearing dark in silhouette. To show clouds as features that are bright or white rather than dark, the original image has been contrast reversed to produce the image shown here. The nested set of alternating white and dark hexagons indicates that the hexagonal complex extends deep into the atmosphere, at least down to the 3-Earth-atmosphere pressure level, some 75 kilometres underneath the clouds seen by Voyager. Multiple images acquired over a 12-day period show that the feature is nearly stationary, and likely is an unusually strong pole-encircling planetary wave that extends deep into the atmosphere.

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