Server sky — Computation and power in orbit

Arrays of small ultrathin satellites may someday outperform aircraft-sized satellites. Terrestrial data centers and fiber optic networks are unaffordable in developing countries, but data services delivered from orbit through existing cell towers can serve rural communities and provide jobs in the global economy. New solid state technologies permit mass-produced, paper-thin, 20 cm wide five gram “thinsats”, producing 4 watts with 75% availability. Phased arrays of 8000 thinsats in 6400 km altitude orbits can maneuver with light pressure, and communicate simultaneously with hundreds of kilometer-wide ground footprints. Arrays of small solar-powered satellites can outperform aircraft-sized satellites. Space solar power allows exponential power growth without destroying natural habitat.