Each player vies for control of the constellations which are worth victory points. There are 12 constellations and players use 'Stars' to bid for the control. Each star is worth some amount of control over the constellation, and there is a 'Double' star and a 'Black Hole' star thrown into the mix. There is some aspect of bluff in the game since some of your stars may be placed face up or down. - BoardGameGeek