关于这张图
This annotated map of depicts the areas on the surface of Jupiter's moon Ganymede that were imaged by the Jovian Infrared Auroral Mapper (JIRAM) instrument aboard NASA's Juno spacecraft during two close approaches of the moon. The region shaded in blue depicts the area JIRAM covered as Juno flew past at a distance of 62,000 miles (100,000 kilometers) on Dec. 26, 2019. The infrared camera took 40 images during the encounter. The region shaded in red illustrates JIRAM coverage during the July 20, 2021, flyby, when Juno came within 31,000 miles (50,000 kilometers) of Ganymede's surface and JIRAM…
