Mighty morphin' Centaur rings — a distant icy object's rings are transforming 

 What is causing the structure of the dust to evolve, and where exactly the dust comes from, is still a mystery. 

https://cdn.mos.cms.futurecdn.net/7qtNqufWZnsoffEN2EtiPd.jpg

https://www.space.com/comet-chiron-centaur-icy-rings-structure-transformation