FCC Greenlights Space Mirror Startup That Wants to Beam Sunlight to Earth at Night
Finn's Take· TL;DR- FCC approved Reflect Orbital's Eärendil-1 satellite to beam reflected sunlight from orbit, targeting construction, solar farms, and emergency response applications.
- Scientists warn the prototype and proposed 50,000-satellite constellation could blind astronomers, disrupt pilots, damage telescopes, and harm circadian rhythms.
- FCC deemed astronomy concerns outside its jurisdiction; full constellation still requires separate approval and successful prototype demonstration first.
A New Kind of Night Light — From Orbit
What if the sun never truly set — at least not for the people who needed it most? That's the premise behind Reflect Orbital, a California-based startup that cleared a major regulatory hurdle last week when the Federal Communications Commission gave it the green light to move forward with an unprecedented space experiment.
On July 9, the FCC formally authorized the launch of Eärendil-1, a satellite developed by Reflect Orbital that will deploy a thin-film reflector 18 meters on a side in low Earth orbit, reflecting sunlight to the ground. The 142-kilogram spacecraft is scheduled to launch later this year into an orbit 600 to 650 kilometers in altitude, where it will deploy the reflector. Think of it as a giant cosmic mirror — one that could fundamentally change how we think about light, energy, and the night sky.
What the Satellite Would Actually Do
Reflect Orbital says the satellite will direct a moving beam of sunlight onto areas approximately five kilometers, or about 3.1 miles, wide. The low-Earth orbit satellite is equipped with four 18-meter thin-film reflectors designed to reflect sunlight on specific areas on Earth, with the deployment testing the spacecraft's capabilities in extending daylight for several minutes — which can be used for lighting construction sites and search-and-rescue operations, as well as increasing solar farm energy production.
The startup ultimately wants to sell "sunlight on demand" to solar farms, allowing them to continue generating electricity after sunset, and has also floated possible unconventional uses including emergency response, construction, agriculture, military operations, and large outdoor events. The company has even discussed charging roughly $5,000 per hour for customers on an annual contract, with higher rates during emergencies. Beyond the Eärendil-1 prototype, Reflect Orbital has discussed deploying thousands of mirrors by the end of the decade and as many as 50,000 by 2035.
Scientists and Astronomers Are Alarmed
The FCC application drew nearly 2,000 comments, with concerns about the harm the satellite or a future Reflect Orbital constellation could cause. The objections were serious and wide-ranging. The American Astronomical Society said the satellite's reflection could cause eye damage to amateur astronomers and the "temporary flash blinding of pilots and drivers," and Reflect Orbital itself acknowledged the risk of eye damage "if someone were to view Eärendil-1 through a telescope with an aperture larger than 12 inches."
The European Southern Observatory, which operates several major telescopes in Chile, said the full constellation of 50,000 satellites that Reflect Orbital has proposed would increase the background sky brightness at its facilities by a factor of three to four, limiting the ability of telescopes to detect faint objects. Flashes during mirror repositioning could also disrupt pilots and drivers, the light could disrupt circadian rhythms of plants, animals, and humans, and sensitive detectors in research telescopes and star-tracking cameras on lower-altitude satellites could be overloaded and damaged.
The FCC Approved It Anyway — And That Raises Questions
The FCC largely concluded that any impacts of Eärendil-1 on astronomy or the environment were outside its jurisdiction, stating: "We find that concerns about Eärendil-1's impacts on optical astronomy fall outside our review and authorization of the space station and are not a basis for denial." Crucially, the FCC approval does not authorize Reflect Orbital's planned full constellation, and the company still needs to successfully build, launch, deploy, and control Eärendil-1.
Reflect Orbital said the results of this single-satellite mission will inform whether the concept is viable and will assist the company, its prospective customers, and other stakeholders in assessing any future larger-scale deployment. But the broader regulatory gap remains glaring. Whether the company's precautions will be enough if it launches more satellites remains to be seen, but the FCC's approval raises an important question: "If the regulator licensing these satellites has no mandate to examine what they actually do to the sky or the Earth below, then who does?" That question may prove to be the most consequential one of all as Reflect Orbital prepares to light up the night.