Gizmodo has a post on an unusually ambitious plan for space based solar power being promoted in Japan (being dubbed a "death star" in some quarters) - Japan Wants To Ring The Moon With Solar Panels To Power The Earth.
After the Fukushima boondoggle back in 2011, Japan has wholeheartedly embraced solar power as its alternative energy of choice. So much so, that one Japanese construction firm is campaigning to power the whole Earth with solar energy — that they will beam down from the moon.
The Shimizu Corporation wants to, essentially, build a ring of solar panels around the moon’s equator and transmitted back to the Earth via microwave. And they want to get the project, dubbed LUNA RING (yes, all caps), started by 2035.