Astronomers unearthed a diffuse core, also known as a fuzzy core, in Saturn after studying data from NASA's Cassini spacecraft, which focused on the planet's rings. Caltech's Christopher Mankovich, who co-authored a study about the findings published in Nature Astronomy in 2021, explained, "The fuzzy cores resemble sludge. As you move toward the planet's centre, the hydrogen and helium gas in the atmosphere gradually mixes with more and more ice and rock." "It's a bit like parts of Earth's oceans where the saltiness increases as you go deeper and deeper, creating a stable configuration," he added.