Luna

Luna, Earth's moon, is part of the United Nations of Earth and Luna, one of the three great powers of The Expanse. Jules-Pierre Mao's company Mao-Kwikowski Mercantile is based there, and Julie Mao is described as the daughter of wealthy Lunar citizens. At the end of Caliban's War those behind the alien soldier project are brought to justice on Luna, and in Nemesis Games what remains of Earth, Mars and the non-militant OPA meet there.