Ring ripples reveal how long a day lasts on Saturn
The giant planet rotates once every 10 hours and 33 minutes
![Saturn](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2019/01/011819_LG_saturn-day_feat.jpg?fit=860%2C460&ssl=1)
CATCH A WAVE Ripples in Saturn’s rings, shown in this image from the Cassini spacecraft, revealed the length of a day on the gas giant.
Space Science Inst., JPL-Caltech/NASA