Definable Location

Earth Federation
Lurking somewhere in the Arctic Sea, this self-sustaining structure is unheard of by the masses. Some say it is the shape of a Hexagon. It is certain that this is the headquarters for the elite conspirators of the Earth Federation, the superpower controlling Earth driving masses off the planet. Shorthand may be seen as EFHQ.

Moscow
This is a hub for space travel, as well as a connecting point to get to the EFHQ. Moscow is one of the two contrived super cities, serving as the model city for half the world.

Washington D.C
This city controls the other half of the artificially divided world. This is also home to a terrestrial hub for Project Unearthing (originated in 2032, Houston, TX).

Moon
The Moon works like a space harbor, and begins very small. First as a mere settlement, eventually growing to two major colonies - developed by the USA and Russia. Eventually, the Moon becomes a communications hub, as it is positioned outside the atmosphere and signal is unobstructed.

Eden
In addition to being the site of the first Martian settlement, Eden is the capitol of Mars. This eventually grows to become a utopian epicenter of Martian life, containing a space travel hub, an incredible wealth of knowledge and research, and some of the most advanced humans ever known.

Phobos
This is Mars' moon, which serves as a communications hub like Earth's moon. Additionally, Phobos acts as a sort of space harbor, the launch and research epicenter for Project Unearthing after they've left Earth.

New Houston
This is the grounded home of Project Unearthing, which expanded from Eden rather quickly to make use of the huge amount of open land on Mars. Here they house and develop a lifeboat-like spaceship in case their technology on Mars ever fails.

Extraterra
This is more or less a suburb of Eden (in the way the entire state of Wisconsin is like a suburb of Chicago). The climate in this region is the most favorable on the planet for sustaining human life. This area is rich with communal living, packing in hugely dense populations very efficiently.