A California startup wants to use giant orbiting mirrors to reflect sunlight onto Earth after dark. The first test satellite ...

A company called Reflect Orbital wants to illuminate the Earth after sunset with orbital sky mirrors, raising alarm bells.

However, future reflectors in the planned constellation could have mirrors up to 177 feet (54 m) across, which would likely create larger and more intense bright spots. Reflect Orbital said it can ...

A new kind of mirror is emerging from quantum physics labs, one that exists not as a chunk of polished glass but as a ...