Location: Alpha and Bravo Risk Sectors
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 the distance is designated as Bravo risk zone. The Alarians consider it the Ergothan Sector in the Zone.