NASA's Juno Maps Subsurface Heat Across Jupiter's Volcanic Moon Io

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NASA's Juno spacecraft used its Microwave Radiometer instrument to map thermal activity beneath the surface of Jupiter's moon Io during two close flybys. The first pass, known as Perijove 57, took place on December 30, 2023, focusing primarily on Io's northern hemisphere. A second flyby, Perijove 58, followed shortly after and extended coverage to additional regions of the moon. Together, the two flybys produced overlapping footprint data that allow scientists to study heat distribution hidden below Io's surface. The findings aim to deepen understanding of the intense volcanic and thermal processes that make Io one of the most geologically active bodies in the solar system.

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