Is There a Future for Space-Based Solar Power?, Space Quarterly Magazine
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"Space-based solar energy production systems, commonly known as 'Solar Power Satellites' or SPS's, offer the prospect of effective, environmentally friendly electrical power.
However, experts involved in designing SPS systems agree that it will take at least ten years - but more likely decades - to develop SPS's capable of feeding the grid back on earth, as launch costs, unclear economic viability, and limited research funding slow the development of this potentially ground-changing energy technology."