Space.com movie: "The Giant Planets" [13'04"]
Jupiter/Saturn/Uranus/Neptune, in general:
     "Cold, fearsome, turbulent...behemoths"
     Rings shaped by interactions with satellites
     "Light elements" = hydrogen and helium (solid cores?)
     Persistent weather patterns (cause?)
Jupiter's satellites:
     Io = Volcanically active (evidence? cause?)
     Europa = "Both old and new" (evidence? cause?)
            = Liquid ocean with active icy crust
     [Skip discussion on Saturn's satellite Titan]
Uranus = rings shaped by interactions with satellites
     [Skip discussion on Uranus' satellites]
Neptune = source of heat for weather patterns?
     Triton = active surface (evidence? cause?)