Juno Mission Reveals Complex Interior of Jupiter

The Juno mission's findings, presented at the European Geosciences Union's 2026 General Assembly, indicate a far more complex interior structure for Jupiter than previously theorized. Juno, launched in 2011 and arriving at Jupiter in 2016, has completed 83 orbits, gathering data on the gas giant's interior, atmosphere, magnetic field, and gravity field. The data suggests that Jupiter may not possess a compact core, or if a core exists, it is significantly smaller than previously estimated (less than six Earth masses). This challenges conventional planet formation theory, which posits that gas giants form around a substantial rock and ice core.

The mission's data necessitates modeling Jupiter as a multi-layered structure, akin to an onion with numerous layers, to accurately perform calculations. This complexity extends to the planet's magnetic field and atmospheric dynamics. The findings have implications for understanding the formation of gas giants and the evolution of planetary systems. The mission continues to gather data as it progresses towards Jupiter's North Pole, promising further insights into the planet's composition and internal processes. The Juno mission is actively rewriting the textbooks on gas giant formation, forcing scientists to reconsider long-held assumptions about planetary interiors.

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