Theme of this card game is space exploration.
Each planet card(includes Sun and Pluto) represents heavenly body of our solar system. Your purpose is to complete these planet cards through auction consist from two stages. If you won and got planet cards, you can take them as Victory Points or enter them into your hand to use for next auction. Used cards at auction are removed from the game.
Planet collection must be consist from unique cards. Thus if you got another planet already be in the Victory pile, you cannot take as VP and you must enter it into your hand.
Who can get highest score at the end of the game?