Natural Satellites are objects in space that orbit a more massive body, such as a planet. They are not visible until the main body has been scanned, but once that is done, they can be scanned and settled individually.
Landers leaving moons require less fuel to reach their destination than from the surface of the closest planet, making them convenient locations for refuelling.
List of Moons[]
Jupiter: Io, Europa, Ganymede, Callisto, Thebe, Amalthea, Himalia, Lysithea, Elara and Metis
Saturn: Mimas, Enceladus, Tethys, Dione, Rhea, Titan, Iapetus, Hyperion, Epimetheus and Janus
Uranus: Titania, Oberon, Ariel, Umbriel, Miranda, Puck, Cressida, Portia, Juliet and Belinda
Neptune: Triton, Proteus, Nereid, Larissa, Galatea, Despina, Thalassa, Naiad, Halimede and Sao
Pluto: Charon, Styx, Nix, Kerebos and Hydra