The US Just Approved a Giant Space Mirror That Will Light Up Earth at Night

A 142-kilogram spacecraft is set to do something no satellite has ever been licensed to do before: deliberately redirect sunlight onto the darkened surface of Earth, on demand, for a paying customer. The satellite is small enough to fit inside a van, but the mirror it carries – an 18-meter (roughly 60-foot) square of ultra-thin reflective film – is anything but. Once unfurled in orbit, it will catch direct sunlight and focus a beam down onto a patch of ground about 3 to 5 miles wide, producing an artificial glow comparable in brightness to a full moon.

The FCC formally authorized the launch of Eärendil-1 on July 9, 2026. The satellite was developed by Reflect Orbital, a California-based startup that will deploy a thin-film reflector 18 meters on a side in low Earth orbit to reflect sunlight to the ground. The authorization puts the US government on record as the first regulator to greenlight what critics are calling one of the most controversial commercial space projects in history. The company’s plans make this single satellite look like a prototype for something far more ambitious.

The scientific community’s response has been swift and pointed. Astronomical societies, wildlife researchers, and public health advocates have all raised specific objections – and the agency approved the project regardless, explicitly acknowledging that most of those concerns fell outside its jurisdiction.

What Eärendil-1 Actually Does

According to SpaceNews, 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. The satellite is designed to direct reflected sunlight onto targeted areas roughly 5 to 6 kilometers wide for brief periods, testing technology the company says could eventually power solar farms after sunset, light construction sites, or assist search-and-rescue operations. Each pass illuminates a target for roughly five minutes before the satellite moves out of position and the mirror tilts away from Earth’s surface.

Reflect Orbital plans to launch the satellite aboard a SpaceX Falcon 9 rocket later this year. Ben Nowack, co-founder and CEO of Reflect Orbital, said in a statement that the FCC approval represented “the first step toward rigorously testing our technology.” Nowack has framed the mission as a step toward weaning the world off fossil fuels – the company’s stated goal is to extend solar energy generation into the nighttime hours, when electricity demand often peaks but solar panels sit idle.

The Business Model Behind the reflect orbital mirror satellite

The FCC authorized a demonstration launch of Reflect Orbital’s Eärendil-1, an 18×18-meter controllable reflector in a near-polar orbit, intended to deliver on-demand illumination comparable to full-moon brightness over roughly 5-kilometer footprints. The company wants to sell that illumination as a service, and its pricing is not subtle.

Reflect Orbital’s commercial rate is $5,000 per hour for use of a single mirror, with customers required to commit to a minimum of 1,000 hours annually – a contract worth $5 million per year. That price point rules out most individual or small-scale buyers. The most obvious candidates are utility-scale solar farms, which generate no electricity after dark, and government agencies that need temporary lighting for emergency operations or military use.

In June 2025, the Air Force Research Laboratory and AFWERX awarded Reflect Orbital a $1.25 million Phase II Small Business Innovation Research contract to develop reflector technology. The company has also attracted significant private capital. In September 2024, Sequoia Capital led a $6.5 million seed round in Reflect Orbital. In May 2025, Lux Capital joined Sequoia Capital and Starship Ventures in a further $20 million raise.

A Constellation That Doesn’t Stop at One

By 2027, Reflect Orbital predicts it will have 36 satellites in orbit capable of reflecting light at 2 lux for 2.5 hours – brightness comparable to street lighting. From there, the growth projections accelerate sharply. The company’s roadmap calls for more than 1,000 satellites by 2028, more than 5,000 by 2030, and a staggering 50,000 by 2035.

The larger satellites in that future fleet are planned to be considerably more powerful than Eärendil-1. By 2035, Reflect Orbital wants more than 50,000 satellites orbiting Earth capable of reflecting enough light to mimic daytime for hours. The American Astronomical Society, the Royal Astronomical Society, and DarkSky International were among the bodies warning about the satellite’s impact on aviation safety, ecosystems, and astronomical research. For the scientific community, those longer-term ambitions are the crux of the problem – not the single test satellite, but what it represents.

Why Astronomers Are Alarmed

The opposition to this reflect orbital mirror satellite project has come from some of the world’s most respected astronomical institutions, and their concerns go beyond preserving a view of the stars.

Olivier Hainaut, an astronomer at the European Southern Observatory (ESO), recently published a peer-reviewed study in Astronomy & Astrophysics based on computer simulations of the potential light pollution from Reflect Orbital’s plans. The full complement of satellites, he found, could collectively make the global night sky three to four times brighter than it is today – with even the planet’s darkest skies becoming roughly as bright as the sky above a suburban town.

Even outside the direct beam, each satellite would appear brighter than Venus – the brightest object in the night sky after the moon. If 50,000 of these space mirrors were deployed, there would be many hundreds or even a few thousand of these super-bright objects visible to observers anywhere on Earth. For working observatories, the consequences are direct and quantifiable: every percentage-point increase in sky brightness requires a proportional increase in telescope exposure times, eating into the finite observing hours of institutions that compete intensely for time on major telescopes. Hainaut’s simulations also showed that the trail from a single Reflect Orbital mirror could spoil an observation with the wide-field camera of the US National Science Foundation’s Vera C. Rubin Observatory.

In a letter sent to the FCC on June 2, the American Astronomical Society sought to halt the upcoming launch, citing the light pollution problem, the potential for eye damage if amateur astronomers view the satellite through a telescope, the risk to pilots and drivers who might be distracted or temporarily blinded by the artificial light, and the waste of federal research dollars if the work of government-funded observatories is compromised.

DarkSky International, an organization focused on limiting light pollution, stated it was evaluating legal options to prevent the satellite from being launched and used.

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What the FCC Did – and Didn’t – Consider

The FCC’s jurisdiction over Eärendil-1 was formally limited from the start, and the agency said so plainly in its approval.

The FCC largely concluded that any impacts of Eärendil-1 on astronomy or the environment were outside its jurisdiction. “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 of or additional conditions on Reflect Orbital’s operations,” the FCC stated.

The FCC’s role in approving the launch was limited to allocating the radio frequency spectrum the satellite will use, rather than assessing the reflector’s overall impact. That regulatory gap is precisely what concerns critics most. No US agency currently has a mandate to evaluate the broader environmental effects of a satellite designed to redirect sunlight, which means a technology with potential consequences for wildlife, astronomy, aviation, and human circadian health fell through a regulatory crack.

The FCC noted that the company has committed to collaborating with NASA and the National Science Foundation to protect optical astronomy and to working with the broader astronomical community on its concerns. The FCC framed Eärendil-1 as “a single satellite and a limited, short-duration technology test exercise designed to evaluate the feasibility of Reflect Orbital’s proposed concept and to identify any challenges associated with future iterations of the technology.”

The Wildlife and Human Health Angle

The objections to the Reflect Orbital mirror satellite aren’t confined to telescope operators. Ecologists and public health researchers have raised concerns about what sustained artificial light at night – even at low intensity – does to living systems.

A 2024 paper published in the AMA Journal of Ethics found that artificial light at night suppresses melatonin production, disrupts sleep quality and duration, and has been linked to depression, obesity, diabetes, and increased cardiovascular risk in both humans and animals. The same research noted that roughly 60% of animals in the wild are nocturnal and are adversely affected by nighttime outdoor lighting – and that marine plankton, the base of the ocean food chain, avoid light-polluted coastal waters when they would otherwise migrate to the surface to feed. Plants are affected too: trees exposed to artificial light at night fail to shed their leaves on schedule and experience shortened lifespans from the resulting environmental stress.

A preliminary study presented at the American Heart Association’s Scientific Sessions 2025 found that people living in areas with higher levels of nighttime artificial light showed increased stress-related activity in the brain, inflamed arteries, and a higher risk of heart disease, according to researchers at Massachusetts General Hospital. The circadian system – the body’s internal 24-hour clock, regulated primarily by cycles of light and darkness – is sensitive enough that even low-intensity artificial light at night can delay sleep onset and suppress melatonin production.

Reflect Orbital has addressed some of these concerns by pointing to safeguards built into the satellite’s design. The company states it limits reflected light to a target spot, steers away from sensitive areas such as observatories or protected habitats, and retains the ability to switch off at any time. The company also says the light will not be intense enough to harm eyes, even when viewed through amateur telescopes. Whether those safeguards scale to a constellation of 50,000 satellites is a question no one can yet answer.

What Comes Next

Reflect Orbital said it is commissioning independent, third-party research on the impact of its technology and working to develop a coordination agreement with the National Science Foundation. The FCC’s approval covers only Eärendil-1 and grants a two-year radio communications authorization – any expansion of the constellation would require separate regulatory review.

The scientific community is not waiting passively. The US currently has no regulatory body other than the FCC that can evaluate the broader environmental effects of orbital light-redirecting technology before harm occurs. For astronomers trying to capture rare or singular celestial events, regulatory penalties after the fact of lost observations are an insufficient remedy. Some legal scholars and astronomers have argued that a large-scale constellation of intentional light reflectors could conflict with the 1967 Outer Space Treaty’s requirement that states avoid “harmful contamination” of space – though the treaty’s application to light pollution has never been tested in practice.

The launch is expected before the end of 2026: a single 60-foot mirror, in a 600-kilometer orbit, producing five minutes of artificial moonlight over a patch of ground three miles wide.

What This Means

The most immediate effect of Eärendil-1’s launch on most people will be nothing they can see or feel. A single satellite passing overhead for minutes at a time will not noticeably change the night sky.

The precedent being set, however, extends well beyond the view through a telescope. If Reflect Orbital’s constellation scales as planned, the night sky visible from any location on Earth changes permanently. A three-to-four-fold brightening of the night sky – the figure Hainaut’s simulations produced for the full 50,000-satellite fleet – would be enough to disrupt circadian rhythms in wildlife, eliminate most naked-eye astronomy, and, according to the European Southern Observatory’s research, render large portions of professional observational work effectively impossible. Those aren’t speculative projections: they are the conclusions of the peer-reviewed study published in Astronomy & Astrophysics in July 2026.

The regulatory gap exposed by this approval is the development to track most closely. The FCC can authorize radio frequencies; it has explicitly said it cannot regulate light. Until the US creates a framework for evaluating the environmental impact of satellites designed to alter natural light conditions, future applications of this kind will face the same jurisdictional vacuum that allowed Eärendil-1 through. For anyone who depends on dark nights – for sleep, for ecosystems, for scientific observation – the question is no longer whether orbital mirrors are coming. The question is who will be responsible for what they do when they arrive.

AI Disclaimer: This article was created with the assistance of AI tools and reviewed by a human editor.

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