Saturn has a fuzzy core, spread over more than half the planet’s diameter
A wave in one of the rings reveals the size and composition of the planet’s core
![planet Saturn](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/05/050421_kc_saturn_feat_REV.jpg?fit=1030%2C580&ssl=1)
Minute ripples in the rings of Saturn, seen in this 2010 image from the Cassini spacecraft, are helping astronomers deduce details about the planet’s hidden core.
Cassini, JPL-Caltech/NASA, Space Science Institute