US Regulators Greenlight Controversial Space Mirror
On July 9, 2026, the US Federal Communications Commission (FCC) authorized Reflect Orbital to build, launch, and operate an experimental mirror satellite named Eärendil-1. The satellite, equipped with an 18-meter reflector, is designed to reflect sunlight onto specific Earth locations at night, potentially illuminating areas 5 to 6 kilometers in diameter for brief periods. The Trump administration granted approval to this ‘on-demand’ sunlight provider, which the company says could boost solar energy production after dark and aid search-and-rescue operations.
Technical Details and Purpose
Eärendil-1 will be deployed at an altitude of approximately 625 kilometers. The primary objective is to test the technical feasibility of an ultrathin, highly reflective film-based reflector. Reflect Orbital envisions operating up to 50,000 such satellites by 2035, though the current FCC authorization covers only this single experimental satellite and not a commercial constellation. The company claims applications include illumination for search-and-rescue, emergency infrastructure support, extended solar energy generation, and lighting remote construction sites without conventional generators.
Scientific and Environmental Opposition
The approval drew sharp criticism from astronomers and environmental advocates. The European Southern Observatory (ESO) called the project an ‘existential threat’ to optical astronomy. During the regulatory review, the FCC received nearly 2,000 public comments opposing the proposal. Leading critics include the American Astronomical Society, DarkSky International, and the Royal Astronomical Society. They warn of increased light pollution, disruption to nocturnal ecosystems, and risks to aviation safety from reflected light flashes. Tony Tyson, chief scientist for the Vera C. Rubin Observatory, expressed doubt about the precision of the reflected light.
FCC Stance and Company Response
In its decision, the FCC stated that concerns about impacts on optical astronomy fall outside the scope of this review and do not justify denying the application or adding conditions. The agency emphasized that any future deployment of multiple satellites would require separate approvals. Reflect Orbital responded on social media, expressing gratitude for the ‘hugely validating’ ruling and pledging to engage with stakeholders and scientific institutions. The company committed to measuring real-world impacts and adjusting its approach if evidence does not support deployment.
Looking Ahead
The Eärendil-1 test mission is expected to provide data on technical viability and identify challenges for future developments. While the startup sees broad civilian and commercial potential, the scientific community remains deeply concerned about the long-term implications for ground-based astronomy and the natural night sky.