Domains

Using the materials found on the Moon, Mars, and asteroids — water ice, regolith, and metals — instead of launching everything from Earth. ISRU is the key to affordable, sustained exploration beyond low Earth orbit.

Making and assembling things in space — 3D-printing parts on a station, building large structures on orbit, and servicing spacecraft — rather than launching everything fully formed inside a rocket fairing.

The persistent facilities that a spacefaring economy needs — propellant depots, habitats, and surface bases — and the megastructure concepts, from space elevators to mass drivers, that would transform access to space.

Generating power in space and beaming it where it is needed — from the arrays that power a station to the concept of space solar-power satellites that would collect sunlight in orbit and send it to Earth.

Moving cargo and spacecraft around in space — orbital tugs, in-space refuelling, and reusable transfer vehicles — the transport layer of an in-space economy.