Feasibility
Some ideas to build a fixed-in-place 'Dyson sphere' are impractical. However, ideas to use orbiting satellites or solar sails employ technology largely already developed. Deployment of spacecraft and satellites using photovoltaics might be seen as the first small steps towards building a Dyson swarm (see below for differences between these sub-types). However, the number of craft required to obtain, transmit, and maintain a complete Dyson sphere far exceeds our present-day industrial capabilities.
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