The largest population centre on Luna is Aldrin, a city in the Mare
Tranquillitatis that is home to almost a million people.
Aldrin is the centre of the Aldrin People's Corporate
Republic, a quasinational polity that exerts control over
Tranquillitatis and much of Foecunditatis. The city
declared independence from Earth as the Lunar
Republic in the late 21st century (an action that inspired
the bloody Hellas Revolt on Mars); such independence
seems largely irrelevant today.
The future of Ad Astra