On Monday (June 7), NASA’s Juno probe zoomed within just 645 miles (1,038 kilometers) of Jupiter’s enormous satellite Ganymede, which is bigger than the planet Mercury. It was the closest any probe had come to Ganymede since May 2000, when NASA’s Galileo spacecraft got within about 620 miles (1,000 km) of the moon’s icy surface. The JunoCam photo, which has a resolution of about 0.6 miles (1 km) per pixel, was captured using the instrument’s green filter. The second photo comes courtesy of the Stellar Reference Unit, a black-and-white camera that Juno uses for navigation. Juno occasionally turns its sharp eyes toward other objects in the Jovian system—like the 3,273-mile-wide (5,268 km) Ganymede.