Official rule text
a There are three planetary exploration decks, each of which 36 FIGHTER TOKENS corresponds to a planet trait: cultural, hazardous, and industrial. A fighter token functions as a plastic fighter unit for all game purposes. b Planets that do not have traits, such as Mecatol Rex and planets in home systems, cannot be explored. 36.1 When producing a fighter unit, a player can use a fighter token from the supply instead of c If a planet has multiple traits, the player exploring the a plastic piece. planet chooses which of the corresponding exploration decks to draw from. 36.2 Players can replace their plastic fighters with tokens at any time. d If a player gains control of multiple planets or resolves multiple explore effects at the same time, they choose the 36.3 If a player ever has a fighter token in a system that does not order in which they resolve those explorations, completely contain one of their plastic fighters, that player must replace it resolving each exploration card before resolving the next. with a plastic fighter from their reinforcements.