weird hexagon at Saturn's north pole

[miriam_e]

How is this for odd? At the north pole of Saturn the clouds form a hexagonal structure big enough to fit almost 4 Earths inside. Nobody is sure how this kind of shape can be produced by clouds. At Saturn's south pole there is the normal circular storm pattern everyone would expect.

This hexagonal shape is not new -- it was first seen by the little Voyager space robot when it flew past 26 years ago, in the early 1980s, and it isn't superficial either, these cloud patterns extend down about 75 kilometers (47 miles). Although the clouds race around the edges of the hexagon, the hexagon itself doesn't appear to rotate... odder and odder.

This image is taken in infrared because it is currently winter at that pole, so it is enshrouded in night.

You can read more at http://www.nasa.gov/mission_pages/cassini/multimedia/pia09188.html