Via GeekPress, one of Saturn’s rings is not a ring:
“These strands, initially interpreted as concentric ring segments, are in fact connected and form a single one-arm trailing spiral winding at least three times around Saturn,” Charnoz and colleagues write in the Nov. 25 issue of the journal Science.
The artist’s rendering makes this more understandable.
This discovery has scientists scratching their heads. How could such a structure possibly have formed? But, hey, we figured out the rings — even with their shepherd moons — we’ll figure out the spiral.