Space-based solar power

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Space-based solar power (SBSP or SSP) is the concept of collecting solar power in outer space with solar power satellites (SPS) and distributing it to Earth. Its advantages include a higher collection of energy due to the lack of reflection and absorption by the atmosphere, the possibility of very little night, and a better ability to orient to face the Sun. Space-based solar power systems convert sunlight to some other form of energy (such as microwaves) which can be transmitted through the atmosphere to receivers on the Earth's surface. In the 1970s, groups like the L5 Society promoted space-based solar power for civilian energy. They soon recognized the technology potential as a directed energy weapon for ballistic missile defense. This dual-use shaped the 1980s Strategic Defense Initiative (SDI)—whose prominent architects, including physicist Lowell Wood, were early L5 members. Orbital power generation and directed-energy transmission continue to receive funding for modern missile defense...

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