Mapping Io’s Hidden Heat With NASA’s Juno

NASA's Juno spacecraft utilized its Microwave Radiometer (MWR) instrument to map heat distribution across Jupiter’s volcanic moon, Io, through two distinct flybys. Specifically, the MWR recorded data from areas sampled during Perijove 57 on December 30, 2023, which focused on mapping Io’s northern hemisphere. Overlapping black lines illustrate the instrument’s precise footprint locations for this particular pass. Subsequent measurements were taken during Perijove 58, though details regarding that event are not specified in this graphic description. This detailed mapping provides valuable insights into Io’s internal thermal processes and geological activity.