Blurb from Cubicle 7 website:
Rocket Age is the core rulebook in our new radium-powered game line of interplanetary adventure! Powered by the Vortex System (like our Doctor Who game) it's packed to the fins with all the rules, setting information and game ideas to keep you playing throughout your very own rocket age!
Players take the role of heroes, whatever sort of heroes they want. There are thirteen playable intelligent species and sub-species ranging from Earthlings to Venusians. What sort of game you play is up to you. Characters might be freebooters on Mars, small time merchants running between the planets, or even members of the elite Rocket Rangers blasting off from one hot spot to another.
Rocket Age is a 256 page hard cover book written by Ken Spencer, featuring black and white art by Jon Hodgson, Scott Purdy and Paul Bourne.