In the photo you can see the wave structure on the rings of Saturn, called the Janus spiral density wave 2: 1. Because of the process that forms spiral galaxies, spiral density waves are wound more strongly. And every second ridge is the same, but already rounds the planet several times.
This is the only formation seen in Ring B. It begins at a distance of 96233 km from Saturn. On this site, the particles bypass the planet twice in one pass of the satellite Janus. The wave comes out due to resonance. Researchers cannot yet understand why the damping of the waves is weaker in this ring, compared to A. The image creates the appearance that the annular plane is deflected from the camera, but it is not. It's all about the principle of wave propagation, whose length is reduced with remoteness. As a result, the top left is much closer than the bottom right.
The wave is interesting because the generating Janus is located in a bizarre orbital configuration. Each time it approaches, the ring reacts, creating a new crest in the wave. If so, then a part of the wave in the uppermost corner was formed back in the 1980s, when Voyager arrived.
This picture was taken on June 4, 2017 on Cassini’s camera. The device is located on the illuminated sunny side at a distance of 76,000 km.
