Monday, May 14, 2007

ultra large geometry

Some twenty years ago, Voyager 1&2 took pictures of a strange phenomenon in saturnian atmosphere. Now, in the 15 years long saturnian polar night, Cassini imaged it again. It is a spinning hexagon four times the size of Earth. It spins and spins and spins at the nordic pole of Saturn. For now, nobody can tell exactly what it is and how it works. Best guess is that is just a strangely shaped polar vortex, similar to the Earth's circular polar vortex.

More on this...

photo credit: NASA/JPL/University of Arizona

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