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Luna is Earth's only moon. It is under the jurisdiction of the United Nations, and its inhabitants have all the rights and privileges of Earth citizenship.

Luna's space port is located in the lunar city, Lovell. Lovell is home to the New Hague United Nations facilities. Outer Planets Command and the Outer Planets Governing Board are both located on Luna's surface.

In orbit around Luna are the Bush Naval shipyards and Mao Station. Lagrange stations occupy positions at Luna's Lagrange points.

Luna is a highly symbolic location: as a meeting spot for those who have chosen to leave the gravity well to meet with their family back on Earth, it is a potential icon for peaceful coexistence between the Inners and Outers.

Although heavily developed and populated, much of the structures are underground, and therefore not visible from space. The underground location protects residents from micro-meteoroid impacts and the effects of cosmic and solar radiation. Large ultra-high-definition viewscreens located throughout the Luna facilities simulate windows looking out upon the lunar surface.