The twelfth planet of the primary of the Nivenia System, A12, is currently a mining colony of the Nivenian Empire. Like A11, it is highly urbanized, but it is a lot larger planet. Like A11, A12 used to focuses on the extraction of gases from the ice and water on the planet, along with the extraction of ionic salts containing magnesium and calcium. However, these resources have been completely extracted, and the planet is shifting toward a more administrative and research-oriented role.
Even though A12 was not the first planet colonized by the Nivenian Empire, it is the largest terrestrial one, and functions as a major spaceport. A12 is actually part of the A12-A12.1 binary planet, and both are colonized and developed as mining colonies for the Nivenian Empire. A carbon nanotube tether connects the two planets, allowing for a huge station at the center of mass and space elevators going to both planets.
A12 is the most populated conventionally inhabited terrestrial planet in the Nivenian Empire, save Nivenia Prime, not due to population density, but due to surface area.
The economy of A12 used to be based on the alkaline earth metals and methane extracted from the subsurface oceans. However, these resources have dried up, leading to the planet starting to get involved in service-sector, administrative, and research-oriented industries. It is also one of the largest trading hubs in the Nivenian Empire, so trading and storage are major planetary industries as well. Being closely linked with A12.1, prices for most items are closer on the two objects than would otherwise be expected.
Things that cannot be made on-planet, like electronics and shields, are imported from Nivenia Prime, but the main imports are food and metals, as the population density on the planet is largely too high for hydroponics, and there surface is covered with an ocean over a hundred kilometers deep, with thousands of kilometers of ice below that.
Nivenia A12 was one of the first to implement a "radical terraforming and urbanization" policy, as it was called by the planetary government, which was inspired by the resounding success of the Thadus 0037 colony's terraforming project. The terraforming was helped by the already-existing terraforming infrastructure for A12.1, which was used for the heating, atmosphere generation, and terraforming of A12.
A timeline the terraforming project is shown as follows:
- Terraform to T1 - Novemex 35, 36 NE to Ianuaria 34, 37 NE
- Terraform to T2 - Ianuaria 35, 37 NE to Novemex 34, 37 NE
- Terraform to T3 - Novemex 35, 37 NE to Ianuaria 34, 38 NE