Divide your guests into two teams. The teams must race to find a complete set of the planets. Once they have collected all of their planets, they have to hang them in the correct position on the poster board. The first team to complete their solar system poster wins.  Players should take turns tossing their rocket ships through the series of rings. Score one point for every ring a ship sails through without hitting the sides. The player who scores the most points wins, or you can award different trinket prizes based on point totals.