Credit/Permission: NASA / JPL / German Aerospace Center (DLR), 1997 (uploaded to Wikimedia Commons by User:Dodo, 2005) / Public domain.
Download site: PIA00600: Family Portrait of Jupiter's Great Red Spot and the Galilean Satellites.
Image link: Wikimedia Commons: File:Jupiter and the Galilean Satellites.jpg.
Local file: local link: jupiter_galilean_moons_collage.html.
File: Jupiter moons file: jupiter_galilean_moons_collage.html.