Space agencies are examining the idea of constructing enormous orbital arrays of solar panels, then beaming the power to Earth via microwaves. So how does it work, and can space solar compete with the terrestrial kind?
was eventually dismissed as too expensive, and consigned to the attic of Space Age fantasies, along with lunar bases and ray guns.
These challenges are partly economic. One reason that SPSB is back on the agenda is the plummeting cost per kilogram of launching payloads into space. However, because the SBSP array would be orbiting much further out, it would appear smaller than the space station — about the size of a small star. So long as just 10 per cent of the power that falls on the panels is delivered to the grid, SBSP can be economically viable, these studies say.
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