Sometimes, when a ship finds a detection range derelict, and then moves to an adjacent system, certains parts of the map a bit further out show up (albeit still scanlined). I think the temporary derelict effect isn't being removed at the right timing.
Revision 5725, which updated nacent art. intelligence, benefits outposts as well. Here's the fix:
Weird derelict effects; nacent art. intelligence v0.4.2 RC1
Moderator: Oberlus