Universe Mass Effect Universe
Cluster Styx Theta
System Erebus System
Class Gas Giant
Radius 21,481 km (13,347.64897 mi)
Atmosphere Hydrogen and helium with traces of sulphur and hydrocarbons
Notable Species Possible hydrocarbon life (unverified)
Rotation period 13.7 Earth Hours
Orbital Period 56.9 Earth Years

Chofen is an unusually small hydrogen-helium gas giant, with traces of sulphur and hydrocarbons in the atmosphere. The Alliance surveyor ship Ibn Battuta provided inconclusive evidence of hydrocarbon life in the atmosphere (over 1000 meters below the cloud tops), where pressure compresses Chofen's hydrogen into a liquid state.

Proof of life in the atmosphere would prove many long-standing theories. Unfortunately, only a probe with extremely expensive mass effect generators could survive the crushing pressure long enough to send back useful data—and the probe would be lost in the attempt. Simple expense makes investigation doubtful.

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