Saturn's ribbonlike cloud structure PIA01378
The extensive ribbonlike cloud structure in Saturn's atmosphere is visible in this Voyager 2 green-filter photograph, obtained 23 August from a range of 2.5 million kilometers.

Some Voyager scientists have interpreted the ribbon to be a large-scale atmospheric wave; it is believed to lie in a rapid eastward-moving jetstream. The presence of vortices adjacent to the ribbon itself will help scientists understand the relationship between such structures and the strong jet-streams present in Saturn's atmosphere. The smallest features visible in this photograph measure about 50 km across.
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Image Credit: JPL, NASA