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Prerequisite: Horizon (mission) (Mass Effect 2)
Prerequisite: Priority: The Citadel II (Mass Effect 3)

Dholen is turning into a red giant. As the star matures, the system experiences magnetic eruptions and increased solar output. This is a gateway system, although it has no fuel depot.

Because this is a geth-controlled system, all civilian traffic is prohibited. Resource estimates are moderate to rich.

Prior to the boarding operation aboard the Alarei, Kal'Reegar (if he survived the assault on Haestrom) informs Shepard and Tali that quarian scientists are worried about dark energy destabilizing Dholen and causing it to mature into a red giant too rapidly by reducing the mass of its interior. Though there is a consensus that the geth were not responsible for the anomaly, it is left unclear as to whether this phenomenon is natural or artificial.

Mass relay

Main article: Mass relay

Charoum

Charoum is the second planet orbiting the star Dholen.

Main article: Charoum

Gotha

Gotha is the first planet orbiting the star Dholen.

Main article: Gotha

Haestrom

Haestrom is the third planet orbiting the star Dholen.

Main article: Haestrom

Quarian Envoy Ship

Main article: Quarian Envoy Ship

Note: Only present in Mass Effect 3.

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