take 3?...rare triple eclipse of some of Jupiter's moons
Three of Jupiter's largest moons -- Io, Ganymede, and Callisto -- cast dark shadows on Jupiter in this near-infrared image. In these mini-solar eclipses, the moons block the sunlight that otherwise reflects off Jupiter. Io's shadow is located just above center and to the left; Ganymede's on the planet's left edge; and Callisto's near the right edge.
Two of the moons are directly visible in the image. Io is the white circle in the center, and Ganymede is the blue circle at upper right. Callisto is out of the image and to the right.