In case you missed this. These amazing photos were taken with an Earth based scope!!!!! IO and Ganymede Occulation By Stefano Quaresima http://www.astrobin.com/full/159859/0/
Edmund Scientific Super Space Conqueror 6" f8 Newtonian Reflector Software Bisque Paramount MX Celestron C-11 Schmidt Cass. Planetary, Lunar, Solar, Deep Sky