An article published in the journal “Nature Astronomy” reports a study on the planet Saturn’s core. Caltech astronomers Christopher Mankovich and Jim Fuller analyzed data collected by the Cassini space probe on the oscillations of Saturn’s rings caused by the internal seismic activity to indirectly analyze the characteristics of the planet’s interior. The conclusion is that the core is not rocky but a mixture that has been compared to a soup or a sludge composed of ice, rock, and metallic fluids that fill a volume for about 60% of Saturn’s diameter, far more than it was previously estimated.