Infrastructure

There are a number of infrastructure projects a faction or groups of factions would be able to undertake solely or jointly.

Habitats
Habitats can be built on an empty hex of a planet, moon or other body. They provide the living space for a population which can perform work. Habitats are the basis for expansion, you must build a habitat before you can build infrastructure within it. With further research, new and more expansive habitats will be made practical. The most important aspect of a habitat is how much space it has. Larger habitats have greater food and energy requirements due to their larger populations, but they allow more space to develop the habitat for the production of food, energy, resources or research.

Habitat Expansions
The buildings below are basic infrastructure which can be built inside of a habitat. They allow the slow expansion of the resource base of a faction. With further research, new and more powerful buildings will be made practical. Due to their production on the habitat, any resources, energy or food produced in a habitat will be subject to gravity well effects (essentially requiring energy to move it off of the world, more energy for larger worlds.)

Orbital Structures
Orbital structures are projects that can be built in orbit of a planet, moon or other stellar body and provide wide-ranging benefits to a faction. As orbital structures however, they are less defensible and immediately obvious to other factions, but they take up no space on a habitat and their resources can be distributed directly to a faction's resource base without gravity well effects.

Megaprojects
Megaprojects are feats of extreme engineering that can provide special bonuses to a faction. While in the early game megaprojects might take years of resource gathering to complete, today's megaproject may become tomorrow's normal habitat expansions.