It is now April 10th, 2000... roughly 52 years into the game. Humanity has expanded to occupy several worlds, the most populous of which are of course in the Sol system. A brief summary follows:
Sol system:
Earth - Class 0 - 2,249,570,000 people (63 million of them unemployed). The population of the Earth has actually gone down (by about 1/4 of a billion) in the past 50 years because of emigration to off-world colonies. The mineral deposits on Earth are effectively exhausted, and the mines are being moved off-planet... largely to Luna and Chiron Prime, where both rich deposits of minerals and the population to operate the mines can be found. Earth's manufacturing sector is still going strong, fueled by the minerals being shipped home from the colonies. Aside from manufacturing, Earth still serves as the primary center for scientific research, ship construction, ship maintenance, refit and overhaul, ground unit construction, officer training and fleet training.
Luna - Class 0 -777,000,000 people (107 million of them unemployed). Luna is one of the major mining centers of our empire, with over 1,700 mines supplying Earth with Duranium, Boronide, Sorium and Corundium. At the current rate of eduction, the smallest ore deposits will begin running out in about 40 years, with the largest deposit being exhausted in about 250 years.
Mars - Class 0 - 306,000,000 people (7.6 million unemployed). Mars is the investment bank of the Sol system, generating 2/3rds of our empire's Financial Center profits and over 1/10th of the worker tax revenues. Commercially, Mars is the healthiest planet in the empire with unemployment running at less than 3%.
Ganymede - Class 0 - 1,544,140,000 people (386 million unemployed). Ganymede is our largest off-world colony, and serves as a source of colonists for the frontier. Lacking minerals, industry, financial institutions, shipyards or recruiting centers, it is effectively a welfare state given over to breeding new colonists to fuel our expansion.
Europa - Class 0 - 726,190,000 people (181 million unemployed). Europa also lacks minerals or industry, and like Ganymede serves as a source of colonists.
Callisto - Class 6 - 181,220,000 people (no unemployment). Unlike Ganymede and Europa, Callisto has not yet been terraformed to Earth-like conditions. as a result, the entire population is required to work in Life-support or service industries. It has, in effect, reached its population cap until the environment can be terraformed to a more hospitable state.
Io - Class 6 - 151,570,000 people (4 million unemployed). Similar to Callisto, the people of Io all work in Life Support and service industries, and the colony has nearly reached its population cap. Only a large-scale terraforming project can break the gridlock and free up population for other endeavors.
These seven planets and moons make up the bulk of the population, with only a thin scattering of people elsewhere in the Sol system.
We also have robot mines on Ceres (147) and Venus (128), orbital mining platforms on Faye (60 mine-equivalents) and a combination of robot mines and orbital platforms on van Biesbroeck (103) and Neujmin (99).
V1216 Sagittarii system:
Chiron Prime - Class 0 - 50,030,000 people (12 million unemployed). Chiron Prime supports mining operations for all eleven trans-Newtonian elements, and as the population expands the current total of 225 mines will be steadily increased. The planet also holds ten Deep Space Tracking Stations, and a fuel stockpile and sufficient maintenance facilities to serve as a service point for scout ships. It thus supports further exploration and expansion in this direction.
Achilles - Class 0 - 38,170,000 people (19 million unemployed). Achilles lacks minerals, and as a result half of the population is out of work. This planet will eventually serve as a breeding ground for colonists.
Comet 3 - This comet is highly mineralized in Duranium, Sorium and Corundium, and holds orbital mining platforms equivalent to 900 mines.
NN 3353 system:
The Establishment - Class 2 - 9,120,000 people (4,380,000 unemployed). This colony was established on a rather inhospitable moon of a Gas Giant, too cold to be fully terraformed to Earth-like conditions. Ordinarily we would not have colonized such a dump, but it was necessary in order to validate our claim to the star system and thereby block the further expansion of the alien race known as "The Hippies". The colony has no important mines or industries, but that was not its purpose. It holds ten Deep Space Tracking Systems, a fuel dump and maintenance facilities sufficient to support scout ship operations.
Comet 6 - This comet is a source of Corbomite, and supports orbital mining platforms equivalent to 120 robot mines.
Sirius system:
Sirius Business - Class 0 - 3,280,000 people (2,330,000 unemployed). This colony is still in the process of development. It has minor mineralization, but its important role will be as a support base for scout ships.
Comet 5 - This comet is a major source of Gallicite, and hosts orbital mining platforms equivalent to 540 robit mines.
Alpha Centauri system:
Alpha Centauri B-III - Class 0 - 200,000 people. This colony is so new that it doesn't yet have a name. It is intended to serve as a scout base.
Other than those populated systems, we also have robot mines or orbital mining platforms harvesting minerals in a number of unpopulated systems:
Lalande 21185 Comet 2 - OMP (300)
Ross 128 Comet 1 - OMP (300)
Wolf 359 Comet 5 - 147 robot mines
Wolf 359 Comet 3 - 44 robot mines
75 Ophiuchi B-II - 75 robot mines