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Zeta Hydronis Secundus system

From Halopedia, the Halo wiki

Zeta Hydronis Secundus
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Stellar overview

Orbiting planets:

At least one


Planetary debris

Societal overview

Notable events:

Attack on the Zeta Hydronis Secundus system



The Zeta Hydronis Secundus system was a planetary system within the Forerunner ecumene. At the height of Forerunner power, the planetoids in the system hosted thriving colonies and impregnable fortresses, but during the Forerunner-Flood war the system fell before the parasite. In the post-Covenant War era, the UNSC found the system, designating Site C to one of a handful of intact Forerunner structures that remained.[1]


The system must be near the very edge of the Milky Way Galaxy, as the Andromeda galaxy is visible from Site C in good detail.

List of appearances[edit]