Juno's recent flyby of Io captured infrared data showing variations in subsurface temperature across the moon's surface. The data indicated that certain regions exhibit higher thermal emissions than previously recorded, suggesting active geological processes beneath the crust. The spacecraft also observed that large areas of Io's terrain appear unusually smooth, with minimal topographic roughness. NASA scientists said the findings provide new insight into Io's volcanic activity and internal structure. The results were published in a peer‑reviewed study based on Juno's Jovian Infrared Auroral Mapper observations.