That sounds fair.
Well take this Organic Life Destroying Rays of Terror... They would have to be in place for a while to actually destroy all organic life. So it's not a Death Star like thing where it fires once and destroys it instantly. It'll be more like, If left unchecked for its duration, during the rotation of said planet, the rays sit in one spot slowly dehydrates most water based creatures. If the rays are left day after day after day then their job would be complete. So, if the planets defenses are wiped out then there wouldn't be any help for them unless they have allies.
Awesome, so whats the Character/race/nation sheet gonna look like?
Solar systems are smaller then those sectors. I would assume those smaller white dots scattered around are solar systems.
Calling dibs on sector 6 (and 13 if it works like last time. )