There is an interesting little bit about the universe in Silver Surfer Annual 2. It talks of distances from Skrull space to Kree to Earth and other things. Probably one of the first things that actually creates a "map" of sorts besides Asgard. There's also some space scale things in The Nova Corps Files with the scope of the Annihilation wave.
My subordinate Galan will be in shortly with the scans.
"The Grand Admiral was smart and subtle, but never used his brilliance to show up or humiliate anyone.
He demanded results, but never perfection, and had amazing stores of patience for those who were truly working to their fullest ability.
It was a pity Thrawn's style of leadership hadn't spread through the rest of the navy.
If that happened, he suspected, the Empire would stand forever."