But to respond to your actual point about the 2d map and astronomical accuracy... I have to say that at TravCon it's never been an issue as we essentially have four hours, tackle one game and onto the next thing... everyone buys into the Traveller universe and just gets on with it. The first adventure I ever ran (Into the Unknown, above), I was terrified someone might call me out on the exact details of the brown dwarf thing. I'm sure real stellar physicists will cringe... But having done a tiny bit of research to have a plausible enough mcguffin, no one objected to it.