from en wikipedia HERE where the text reads Sources: This image is primarily based on Image:Moons of solar system.jpg, which is a copy of a NASA compilation found at http://solarsystem.nasa.gov/multimedia/display.cfm?IM_ID=2823

However, en:User:Deuar has also made the following subsequent modifications to better reflect current knowledge:

• Charon was far too small, and Image:Charon_plutoface.png was scaled and used to rectify this.
• Proteus was added, Image:Proteus (Voyager 2).jpg was used
• Noise in the Nereid image was color-filtered out
• Ariel was only partially seen, so NASA image http://photojournal.jpl.nasa.gov/jpeg/PIA01351.jpg was used
• Similarly, Rhea and Tethys had bad quality images, and Image:Rhea hi-res PIA07763.jpg as well as the NASA image http://photojournal.jpl.nasa.gov/jpeg/PIA06625.jpg were scaled and inserted instead
• Phobos, Deimos, and Dactyl were far too large to be in scale, and this was rectified.
• Hyperion, was too large, so the newer Cassini image http://photojournal.jpl.nasa.gov/jpeg/PIA07740.jpg was used and scaled.
• The moon image was distorted (elongated in the horizontal direction), http://photojournal.jpl.nasa.gov/jpeg/PIA00305.jpg was used
• Satellites of en:Trans-Neptunian objects greater than ~250 km in diameter were added (synthetic images)
• Inserted scale text and modified title.