Prerequisite: Priority: The Citadel II (Mass Effect 3)
Ialessa is a system in asari territory. Sanves is the only habitable terrestrial world in the system and a tourist destination, and Zylium acts as a refueling spot and auxiliary hospitality sector.
The system has little else in terms of resources other than copper deposits in Nossia. Of particular note is a planet-encircling supercollider in Trikalon that's targeted by the Reapers only days after its first activation.
Ilmnos[]
Ilmnos is the first planet orbiting the star Ialessa.
- Main article: Ilmnos
Nossia[]
Nossia is the fifth planet orbiting the star Ialessa.
- Main article: Nossia
Sanves[]
Sanves is the second planet orbiting the star Ialessa.
- Main article: Sanves
Trikalon[]
Trikalon is the fourth planet orbiting the star Ialessa.
- Main article: Trikalon
Zylium[]
Zylium is the third planet orbiting the star Ialessa.
- Main article: Zylium