The Unmixed Cocktail: Why Double Diffusion Is Powerless in the Interiors of Giant Planets
Forget the familiar images of planetary cores — a sharp boundary between rock and gas is a thing of the past. The Juno probe, diving into Jupiter’s gravitational field, and Cassini, into the embrace of Saturn, discovered that heavy elements are not gathered at the center but smeared over a vast region, as if someone carelessly shook a cocktail.