There's a weird decagon-shaped wave in the atmosphere at Saturn's south pole, and nobody is sure how it got there. The wave was imaged by Hubble and scientists are now puzzling over how it formed.
www.scientificamerican.com/article/scie...
scientificamerican.com
Scientists discover a mysterious wave shaped like a decagon in Saturn's atmosphere
The strange structure appears to have formed recently, but nobody can explain exactly why