The goal of the game is to conquer a maximum number of planets from the solar system. Each player is to take turns to a planet. A player can explore more than one planet per trip. A planet can be explored by several players. A player marks his or her arrival on a plate with a pawn under. A player should always have 3 cards in his or her hand. Each turn a player chooses a card, places it face up next to the board, and performs the action of the card. Upon returning to Earth, a player awaits the next turn to start a new trip.