Cities usually fade into darkness within minutes after sunset. Streetlights switch on across neighborhoods while construction crews shut down equipment for the night. Solar farms stop producing ...

The company is seeking F.C.C. approval to test an idea to reflect sunlight to Earth at night, possibly powering solar panels. Critics say it could be bad for people and wildlife.

A provocative startup claims it will soon let people buy spots of sunlight reflected with a giant satellite mirror — but there are still a lot of outstanding questions about how (and whether) the ...

Imagine it: You’ve worked a long shift, turned the lights out and settled into bed, when all of a sudden the sky outside your window lights up as if it’s daylight. This is what could happen if a U.S.