Advances in robotics and additive manufacturing have become game-changing for the prospects of space industry. It has become feasible to bootstrap a self-sustaining, self-expanding industry at reasonably low cost. Simple modeling was developed to identify the main parameters of successful bootstrapping. This indicates that bootstrapping can be achieved with as little as 12 metric tons (MT) landed on the Moon during a period of about 20 years. The equipment will be teleoperated and then transitioned to full autonomy so the industry can spread to the asteroid belt and beyond. The strategy begins with a sub-replicating system and evolves it toward full self-sustainability (full closure) via an in situ technology spiral. The industry grows exponentially due to the free real estate, energy, and material resources of space. The mass of industrial assets at the end of bootstrapping will be 156 MT with 60 humanoid robots, or as high as 40,000MT with as many as 100,000 humanoid robots if faster manufacturing is supported by launching a total of 41 MT to the Moon. Within another few decades with no further investment, it can have millions of times the industrial capacity of the United States.
Nextbigfuture believes that initially a simpler way to jumpstart moon based solar power would be to use mirrors to melt the regolith of a crater into glass and then spray reflective metal onto it. Concentrated sunlight could be used to melt regolith. It would be crude and simple way to generate of lot of power. The crater sunlight would be focused onto a stirling engine.
Concentrating solar power (CSP) plants use mirrors to concentrate the energy from the sun to drive traditional steam turbines or engines that create electricity. The thermal energy concentrated in a CSP plant can be stored and used to produce electricity when it is needed, day or night.
A CSP plant operates most efficiently when built in sizes of 100 MW and higher, requiring about ten acres of land.
It would be simpler to produce large quantities of lunar glass and mirrors than to make factories for solar cells.
The stirling engines for power conversion could initially be brought from Earth.
Concentrated solar in crater would simplify the creation of gigawatt levels of power.
Power would still be used to produce factories and robots on the moon like the original plan.