Darkness is losing its war with the light

Darkness is losing its war with the light. In a move that has sparked alarm among astronomers worldwide, an American startup called Reflect Orbital has secured approval from the U.S. Federal Communications Commission (FCC) to launch Eärendil-1, a satellite equipped with an 18-meter-by-18-meter mirror. Designed to reflect sunlight onto the dark side of Earth, the device aims to illuminate a five-square-kilometer area with the brightness of four full moons. The project marks the beginning of a larger ambition: deploying 50,000 such mirrors by 2035 to deliver "sunlight as a service," promising to revolutionize energy production, urban lighting, and industrial operations around the clock. Reflect Orbital, based in Hawthorne, California, describes itself as "The Sunlight Company." Its chief executive, Ben Nowack, claims the initiative will enable solar panels to generate power continuously, offer safer street lighting for cities willing to pay, and support 24-hour construction and farming activities. The company's approach resembles a digital platform, with users able to order sunlight through an app, akin to summoning a ride via Uber. According to a statement released by Reflect Orbital, the technology is designed to be precise and controlled, with the ability to adjust brightness levels and shut down entirely when needed. Permits will be required for any location receiving the service, ensuring that the majority of the population will remain unaffected. But the astronomical community sees the project as a potential catastrophe. The European Southern Observatory has labeled it an "existential threat" to optical astronomy. The Royal Astronomical Society described the plan as "disastrous," warning that it could "permanently scar" the night sky. The American Astronomical Society told Nature that the deployment of such mirrors could effectively spell the end of ground-based optical astronomy. Sthabile Kolwa, a senior lecturer in astronomy at the University of South Africa, echoed these concerns. She emphasized that the loss of dark skies would rob humanity of a critical tool for understanding the universe. "It might come to this, that we just have to find them in the parking lot and say, 'Hey, what are you guys doing? You're going to ruin science for us,'" Kolwa said. Her research focuses on galaxy evolution, yet she now finds herself preoccupied with the practical implications of artificial light polluting the night sky. The scientific backlash intensified after a research paper published in May challenged Reflect Orbital's assurances. Written by Oliver Hainault of the European Southern Observatory, the study warned that the proposed constellation of 50,000 mirrors would increase the overall brightness of the night sky by 300%, even when the mirrors were directed elsewhere. This added to the growing concern over another ambitious space venture: SpaceX's proposal to construct massive data centers in orbit. Together, these developments could push the limits of what ground-based astronomy can endure. Hainault's findings suggest that the increased ambient light would severely degrade the quality of observations made by terrestrial telescopes. Streaks of reflected sunlight from passing satellites would blur images, making it difficult to detect faint objects such as distant galaxies and black holes. The consequences extend beyond pure science, early detection of asteroids posing a risk to Earth could become significantly harder. As a result, cutting-edge astronomical research may increasingly depend on space-based observatories, which are both costly and limited in number. Reflect Orbital maintains that it is engaged in ongoing discussions with astronomers and environmental experts to minimize the impact of its technology. However, critics argue that mitigation efforts may not be sufficient given the scale of the project. The company's claim that most people and places will never see the light has been met with skepticism, particularly in regions where existing light pollution already hampers stargazing. As the FCC's approval sets the stage for the first satellite launch, the debate over the balance between technological advancement and scientific preservation continues to unfold. With Eärendil-1 scheduled to be deployed within months, the world watches to see whether the promise of artificial sunlight will overshadow the need for the dark, unaltered skies that have guided human curiosity for millennia.