US Approves Giant Satellite Mirror to Light Up Earth at Night

The United States government has granted approval for Reflect Orbital's ambitious Eärendil-1 project, which will deploy a massive mirror satellite into orbit. This satellite is designed to reflect sunlight back to Earth, effectively creating artificial daylight in targeted areas after sunset. The decision by the Federal Communications Commission (FCC) has ignited controversy, drawing sharp criticism from the astronomical and biological communities who fear significant environmental and scientific repercussions.

Eärendil-1, roughly the size of a bedside table, will orbit approximately 400 miles above the Earth's surface. Once in position, it will unfurl a nearly 60-foot-wide square mirror. This mirror will then direct sunlight to illuminate a circular area on the ground, about three miles in diameter. Reflect Orbital co-founder Ben Nowack stated the company plans to charge $5,000 for an hour of mirror usage, contingent on a commitment of 1,000 hours annually. This pricing suggests potential clients like large-scale solar farms, which cease electricity generation at night, or emergency response scenarios, though coordination and cost present challenges.

Concerns Over Skyglow and Ecosystem Disruption

The approval of Eärendil-1 has been met with significant opposition. Astronomers are particularly concerned about the increased light pollution. "It's terrifying to me that one country can change the night sky for everybody in the world," said Samantha Lawler, an astronomer at the University of Regina, in comments to The New York Times. "I need access to dark skies in order to do my research. If you’ve got giant mirrors shining down, then we’ve lost that." The potential for these satellites to obstruct astronomical observations is a primary worry, impacting the study of distant celestial objects and phenomena.

Beyond scientific observation, biologists have issued stark warnings regarding the ecological impact. A coalition of biologists from Europe, the U.S., Japan, and Canada expressed their concerns to The Guardian, stating, "The proposed scale of orbital deployment would represent a significant alteration of the natural night-time light environment at a planetary scale." They highlight that disrupting the natural light-dark cycle could have cascading effects on circadian rhythms in both humans and animals, potentially affecting sleep patterns. Furthermore, altered light cycles could interfere with animal migration routes, plant growth cycles, and the behavior of vital marine organisms like phytoplankton, which play a crucial role in the ocean's ecosystem and global oxygen production.

While the FCC has approved only this initial satellite, Reflect Orbital harbors plans for a much larger constellation. The company envisions launching up to 1,000 even larger satellites, each equipped with 180-foot-wide mirrors. Such a deployment could reflect an amount of light equivalent to 100 full moons, dramatically increasing the potential for widespread skyglow and ecosystem disruption. The long-term implications of such extensive artificial illumination on Earth's natural nocturnal environment remain a critical area of concern for scientists worldwide.