A California startup wants to bounce sunlight from orbit onto Earth after dark, and the idea is stirring up serious debate.
A company called Reflect Orbital wants to illuminate the Earth after sunset with orbital sky mirrors, raising alarm bells.
While imperceptible to humans, these tiny delays are significant for experiments that rely on pulsars as ultra-precise cosmic ...
Deep-sky objects shine and the giant planets show off their satellites as the bright light from the Moon disappears from our ...