For many of us who started gaming in the tail end of the 1970s, The Handbook for Space Pioneers: Exoplanet Colonies (1978) by Wolfe and Wysack was basically the first space game supplement that wasn't intended for RPGs at all... and yet...
It provided fully realised worlds, maps, races, threats, economies, deckplans, personality tests, and recruitment ideas for characters.. er.. cough the readers.
Perfect for traveller or Star Trek and packed with colonial issues too.