The planet Saturn has a perfect hexagon encircling its north pole. It is actually a huge slow moving storm. Scientists have been mystified by this phenomenon, but recently researchers at Oxford university recreated the pattern by simulating Saturn’s atmosphere in a cylinder of spinning water with dye in it. They placed a smaller cylinder in the centre which simulated a fast jet stream around the pole. By adjusting the speed of the cylinder they could create a hexagonal pattern in the surrounding fluid. It is now believed that on Saturn the atmosphere rotates at a steady, slow rate, while the jet stream at the pole rotates much faster, forcing the clouds into a hexagonal shape.