First Mention: Primary Collision
Significance: The areas behind Defensive Line Bear, separated into two sectors, Bravo directly behind Bear. Alpha encompasses the areas from beyond Pluto
Description: Mostly empty space with various solar systems scattered throughout. No stations or inhabitated planets during the time covered in Primary Collision.
Location: Alpha reaches from the orbit of Pluto to half the distance to Bear, and the other half f the distance is designated as Bravo risk zone. The Alarians consider it the Ergothan Sector.