Each player controls bases/stations (in the form of little wooden cubes) which they use to attempt to build Economic Centers on the moons of seven planets in an alien planetary system. After moving their tokens on to a planet, players use an interesting little device ('planet ring'/'wormhole' - functions like a blind draw bag) to select one of the tokens on the planet. Players take actions by collecting sets of cards which correspond to the the various planets. The game also features a unique trading system which facilitates the card collecting. Careful card trading and calculating risk of establishing economic centers, and some variants, mitigate some of the luck factor.