The Hubble Space Telescope has captured images of "spokes" appearing to move along Saturn's rings

 

The Hubble Space Telescope has captured images of "spokes" appearing to move along Saturn's rings. The phenomena, which are only visible around Saturn's equinox when the planet's rings are tilted toward the sun, have puzzled scientists since they were first observed by NASA's Voyager mission in the 1980s. The cause of the spokes is still unknown, but NASA researchers suspect Saturn's variable magnetic field is to blame. As Saturn approaches the autumnal equinox of its northern hemisphere, which is expected to occur on May 6, 2025, the spokes are expected to grow more prominent, providing scientists with more data. The markings can appear as bright spots of light or as black splotches, depending on the vantage point of the viewing instrument. It's possible other planets with rings experience similar events, though they've so far only been observed on Saturn's rings.