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Juno finds Jupiter is slightly smaller and more oblate than thought, reshaping understanding of its shape and interior.
NASA's Juno spacecraft has found Jupiter is slightly smaller and more oblate than previously thought, with a new equatorial diameter of 88,841 miles (142,976 km) and a polar diameter of 83,067 miles (133,684 km), about 5 to 15 miles smaller than earlier estimates.
The improved measurements, based on radio signal data collected during a rare Earth-view alignment in 2016–2024, reveal Jupiter’s atmosphere affects its shape more than believed.
The findings, published in Nature Astronomy, refine models of Jupiter’s interior, atmospheric dynamics, and role in solar system formation.
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Juno encuentra que Júpiter es ligeramente más pequeño y más oblato de lo que se pensaba, remodelando la comprensión de su forma e interior.