Saturn's north pole !

The hexagon is nearly 30,000 km (20,000 miles) wide. This is large enough that two Earths could fit inside the storm with room to spare.

It is a standing atmospheric wave created by a powerful jet stream that wraps around the pole. Winds along its edges can exceed 300 km/h (about 220 mph).

At the very center of the hexagon lies a deep, dark polar vortex that extends hundreds of kilometers down into Saturn's atmosphere.

Spacecraft/Mission: NASA/JPL-Caltech/SSI (Space Science Institute).

Like several of these decorative finishes, stencilling is a legacy from very early civilization. In more recent history, it is probably the American settlers whom we have to thank most for keeping the tradition alive, bringing it with them from Europe and using it on walls.

Designer’s Guide to Surfaces and Finishes, 1984

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