Very good point, Wormspeaker - thanks for raising it! I shall indeed have to think on that.
Travel within the game is kept pretty simple, and maps such as those presented to the player in the UI - or indeed like this one, which echoes it - show a much larger region than is actually inhabited. Were even a single pixel of the Milk Way graphic to be made a playable area, the actual percentage of 'exciting' gameplay space would be minute. Instead each map zooms closer in on the galaxy, a hexagonal sector and then an individual star system. It's within these star systems that the titular DarkConduit comes into play: FTL travel is enabled by a network of portals.
I can see it'll take some trial and error to represent this portal network on the map, but I realise the importance of that more acutely now. Thanks for the reality check.
Edit: Just to clarify... The purpose of this map is not to help with our game design: I already have that covered through design documentation and other graphics. So while portraying the method of travel is important for this map as a thematic piece of work, I'm not relying on it as part of a reference document. It's mostly for the art, in that respect.