Solar-powered unmanned aircraft will replace satellites

The Futurist Magazine :
Satellites will soon have competition. Satellites are expensive to deploy-about $100 million-and inaccessible to repair crews when they break. So an alternative closer to Earth is now being explored: Solar-powered unmanned aircraft soaring just 50,000-100,000 feet overhead may cost as little as $5 million to launch, offering a low-cost alternative to satellites used for commercial, military, and scientific applications.