NASA's Hubble Space Telescope (HST) captured an alignment of three of Jupiter's largest moons: Io, Ganymede, and Callisto. Hubble's Near Infrared Camera and Multi-Object Spectrometer imaged the group March 28, 2004.
These moons are roughly the same size as Earth's Moon. In this image, Ganymede's shadow is at the far left; Io's shadow is near the center; and Callisto's shadow is near the right edge. Only two of the satellites are visible in this image Io is the white dot in the center of the image, and Ganymede is the blue dot at upper right. Callisto is out of the image to the right.
These moons are roughly the same size as Earth's Moon. In this image, Ganymede's shadow is at the far left; Io's shadow is near the center; and Callisto's shadow is near the right edge. Only two of the satellites are visible in this image Io is the white dot in the center of the image, and Ganymede is the blue dot at upper right. Callisto is out of the image to the right.