18 Scorpii system

18 Scorpii is a planetary system located 45.7 light years from Earth at the northern edge of the Scorpius constellation. Falaknuma is a UNSC colony within the system.

It was also the site of a minor engagement between UNSC and Covenant forces in 2543, in which UNSC forces were saved what seemed to be stealh Insurrectionist ships.

18 Scorpii has many physical properties in common with the Sun. Cayrel de Strobel (1996) included it in her review of the stars most similar to the Sun, and Porto de Mello & da Silva (1997) identified it as a solar twin.

Trivia

 * 18 Scorpii was identified in September 2003 by astrobiologist Margaret Turnbull from the University of Arizona in Tucson as one of the most promising nearby candidates for hosting life based on her analysis of the HabCat list of stars.
 * No planets have yet been confirmed to orbit the real-life star.
 * It is so far one of the farthest UNSC colony from Earth to date, exceeding Coral which is placed at 42 lightyears from Earth, but not 111 Tauri which is at 47.8 lightyears.