Luna

The moon of Earth, Luna is also the Sol System's third most populated body with over 30 million permanent residents. Once the headquarters of the humanocentric Terra Prime terrorist movement, the makeup of the "lunar schooners" (as they are often called, to their disgust) has transformed to become one of the Federation's most diverse major worlds. It has also gained a reputation as an unusually potent cultural melting pot, producing unpredictable outcomes like thousands of devout human Surakians and the galaxy's largest cohort of Andorian Muslims. Massive metropolitan centers like Tycho City, Lake Armstrong, and New Berlin can be readily identified on a clear day from Earth's surface, while the capital - Luna City, often called "Lucy" by natives - lies on the 'dark' side of the moon and remains hidden from view.

Starfleet has a relatively sparse presence on Luna compared to Earth and Mars, but the Chang'e Preparatory Academy in New Tranquility is considered to be such a potent pipeline into the Academy that it's often considered a de facto sub-campus. The recent expansion on the Federation has seen attendance swell to include members of 38 separate species, including the children of several high-level foreign diplomats.