Reflect Orbital has been given the green light to launch its first space mirror that aims to redirect sunlight down to Earth at night. The US Federal Communications Commission (FCC) has authorized the California-based startup to build and operate a single prototype satellite in low-Earth orbit later this year, despite concerns over how the technology could impact optical astronomy.

The satellite, named Eärendil-1 in reference to a Tolkien character, will attempt to redirect sunlight to specific areas on Earth after dark using a 59-foot (18-meter) reflective surface. If successful, Reflect Orbital plans to launch and operate a constellation …

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