100% the Sol Coalition - or whatever intervening governments came about in the 800 years since they were last in-view. Using the universe map to transition from "Sirius Sector" to "Sol Sector" or something has been a juvenile fantasy of mine since seeing the map zoom out that far.
Also because it'd be really funny to see homeworlders view the Sirius Coalition as backwards provincials living in a cultural stasis that was left behind in Sol (just like the Houses).
