The exploration of a JP leads sometimes to a new Jump connexion between 2 visited sectors.
In my current game, these (3) new connexions are "short" : never more than 2 jumps.
Can it be longer ? Is it possible that I find a new connexion between a very far system and Sol. And more important : is it possible that someone else find a new connexion right inside my homeworld ?
In a finite galaxy, it seems logic to find more new connexions as the exploration goes on.