A persisting hexagonal wave pattern around the north polar vortex in the atmosphere at about 78°N was first noted in the Voyager images.
The sides of the hexagon are each about 13,800 km (8,600 mi) long, which is longer than the diameter of the Earth.
The entire structure rotates with a period of  10ʰ 39ᵐ 24ˢ (the same period as that of the planet's radio emissions) which is assumed to be equal to the period of rotation of Saturn's interior.
The hexagonal feature does not shift in longitude like the other clouds in the visible atmosphere.
The pattern's origin is a matter of much speculation.
Most scientists think  it is a standing wave pattern in the atmosphere.
Polygonal shapes have been replicated in the laboratory through differential rotation of fluids.
A persisting hexagonal wave pattern around the north polar vortex in the atmosphere at about 78°N was first noted in the Voyager images. The sides of the hexagon are each about 13,800 km (8,600 mi) long, which is longer than the diameter of the Earth. The entire structure rotates with a period of  10ʰ 39ᵐ 24ˢ (the same period as that of the planet's radio emissions) which is assumed to be equal to the period of rotation of Saturn's interior. The hexagonal feature does not shift in longitude like the other clouds in the visible atmosphere. The pattern's origin is a matter of much speculation. Most scientists think  it is a standing wave pattern in the atmosphere. Polygonal shapes have been replicated in the laboratory through differential rotation of fluids.
Saturn