Credit/Permission: User:Matma Rex, 2011 / Public domain.
Image link: Wikipedia: File:Galilean moon Laplace resonance animation.gif.
Local file: local link: jupiter_galilean_moons_resonance.html.
Short File: Jupiter moons file: jupiter_galilean_moons_resonance_2b.html.
File: Jupiter moons file: jupiter_galilean_moons_resonance.html.