From publisher blurb:
The Hub is home to humanity, a huge space station floating in the Gamma Celia Start System. But, the Hub also controls two other Star Systems in what is called Hub Controlled Space.
In this Sourcebook are descriptions of two new System. 12 new planets, 2 new alien species and some heroes of the void.
This sourcebook can be used with either the D20 Directors Cut of Deluxe Editions, and also the Powered by the Apocalypse Death Row Edition of the game.