The U.S. Federal Communications Commission (FCC) has authorized Reflect Orbital, a Santa Monica, California-based startup, to launch and operate an experimental satellite designed to reflect sunlight onto Earth during nighttime hours. The approval, granted on July 9, allows for the deployment of a single test satellite, Eärendil-1, into low Earth orbit.
The satellite, which weighs 142 kilograms (313 pounds), is equipped with a steerable, thin-film square mirror measuring 18 meters by 18 meters (approximately 60 feet by 60 feet). According to company officials, the spacecraft is intended to test the feasibility of directing sunlight to specific ground locations to support solar energy production, emergency search-and-rescue operations, and construction projects that require illumination after dark.
Technological Goals and Operational Scope
Reflect Orbital’s stated mission is to overcome the limitations of solar power, which typically cannot collect energy after sunset. By reflecting sunlight onto solar panel installations, the company suggests that utility providers could reduce their reliance on fossil fuels during evening electricity demand spikes.
The Eärendil-1 satellite is designed to reflect sunlight onto a roughly 3-mile radius on the Earth’s surface. Reflect Orbital CEO Ben Nowack stated that the company has focused on precision, aiming to control the light beam so that it only illuminates requested areas. The company asserts that the light is not intense enough to cause fires or eye damage and that the system can be deactivated instantly to avoid sensitive areas, such as research observatories or protected habitats.
While the current authorization is limited to a single technology demonstration, Reflect Orbital has disclosed long-term ambitions to deploy a constellation of 50,000 satellites by 2035.
Scientific and Environmental Concerns
The proposal has drawn significant opposition from the scientific community. During the regulatory review process, the FCC received nearly 2,000 public comments, with many organizations—including the American Astronomical Society, the Royal Astronomical Society, and DarkSky International—expressing concerns over the potential for global ecological, cultural, and regulatory consequences. Astronomers argue that even a single mirror satellite could interfere with sensitive equipment. This “light pollution” could hinder astronomical observations even when the mirrors are not pointed directly at an observatory. According to the American Astronomical Society, the Eärendil-1 satellite is expected to have an optical brightness at least two to four times that of the full moon. Other concerns raised by critics include:
* Potential “flash blinding” of aircraft pilots and drivers.
* Disruption of nocturnal wildlife cycles due to artificial light.
* The cumulative impact of future large-scale satellite constellations.
* The lack of an established regulatory framework for space-based lighting services.
For more on this story, see FCC Approves First Sunlight-Reflecting Satellite for Earth Illumination.
Regulatory Context and Future Outlook
In its decision, the FCC emphasized that the approval is strictly for a single, limited-duration technology demonstration. The agency stated that the results from this mission will help determine the technical viability of the concept and identify challenges associated with any future development. Any expansion beyond this test satellite would require new, separate regulatory approvals. Reflect Orbital has expressed a willingness to work alongside regulators and scientists to address these concerns as the project moves toward its scheduled launch on a SpaceX Falcon 9, expected later in 2026. Despite the company’s stated intent to operate safely, critics maintain that the technology represents an existential threat to the integrity of the night sky. As the industry watches the development of the Eärendil-1 mission, the debate over the commercial use of low Earth orbit continues to intensify, balancing the potential for energy innovation against the preservation of natural darkness.
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