Part 4/12:
Yet, the most surprising revelations came from Juno, which arrived at Jupiter in 2016. Using highly precise gravitational measurements, Juno detected unexpected irregularities in Jupiter's gravity field. Instead of the symmetry expected from a well-defined, solid core, the data indicated a diffuse, complex interior. The gravitational anomalies suggested that Jupiter does not have a traditional core but instead contains a "fuzzy" core—a vast, gradually transitioning region where heavy elements like metals and rock are mixed with hydrogen and helium over thousands of miles.