Zheng He is a star system located in the Heleus cluster.
Headquarters of the Andromeda Initiative, the Nexus is a massive space station designed to anchor the returning arks, process resources, and support colonists before their departure to new worlds. All new arrivals must pass quarantine.
An anomaly is detected in this system. Scanning reveals Element Zero.
An unusually rich deposit of element zero (eezo). This appears to be a primary source broken up by space-time distortions in the Scourge.