In Civ games so far the Space Race has been quite short, you build the Apollo Program and then you build the starship to Alpha Centauri. I say it´s TOO SHORT, there needs to be A LOT more stuff to do in space and the starship needs to be a whole lot HARDER to build. At our current level of technology, a starship would be IMPOSSIBLE to build, we don´t have powerful enough engines, we don´t have cryogenics (necessary for a "sleeper ship"), we don´t have Faster Than Light engines or Warp Drives (necessary for any other sort of starship), we don´t have artificial gravity (necessary for long duration flights). In short, we don´t have many of the technologies necessary to go to stars, we can barely reach Mars if we try real hard. I say the Space Race needs to be a LOT longer and take more steps to complete. First you have the Apollo Program and the Moon Race. Then you have other programs like the Space Shuttle and the ISS (necessary scientific steps to study zero-g environment etc. ). After those you have the Mars flight and Colonization of Mars (every civilization can produce their own Mars flight wonder and Mars Colony). Modular projects built by building modules like in the starship. You have Space Station modules and Mars Colony Modules etc. Of course the assembling of ships to go to Mars etc. requires a system to get stuff into orbit CHEAPLY, so the Space Elevator national wonder must be built (it should be a national wonder because after they discover the technology to make it possible, EVERY major nation on earth will probably build their own Space Elevator to gain better access to space). When you at last discover the necessary techs to build a starship, you can start assembling it in orbit ( a large ship like that HAS TO BE assembled in orbit), first you must build a Space Dock to build your ship of course. Of course there has to be a project or wonder "the search for habitable planets", before you can launch. Then you assemble your starship and launch it. At this point there could be a choice, there could be SEVERAL star systems where you can go, there could be a list of nearby star systems and you could send a starship to them all, if the space race is made long enough (could be modded). Perhaps one starship isn´t enough to guarantee victory, but you would need SEVERAL to gain enough "space influence" points to declare yourself the victor. This for those who REALLY like a long game, of course one starship might be enough if it is set so in the victory conditions. So SEVERAL modular projects to build, A Space Station, A Mars Colony and the Starship. More could be modded. Cheers!