Kerona is an reddish desert planet located in the Outer Zone. Its exact location is unclear but it is implied to be located within the Earnon Galaxy (although other details may suggest it overlaps within the Andromeda Galaxy as well). Roger visited it during the Space Quest I: Roger Wilco in the Sarien Encounter (time sector). Kerona was changed into its present form by actions of Roger Wilco changing history during his travels through time, the earlier known Kerona(aka Ulence) was physically different world in the Space Quest I: The Sarien Encounter (original version) time sector.