The Controversial Plan for Reflect Orbital’s Sunlight-Reflecting Satellites

• California-based company Reflect Orbital is developing orbital mirrors designed to beam sunlight down to Earth after dark.
• Astronomers warn that the project poses severe light pollution risks and threatens the integrity of the night sky.

Research Findings and Brightness Estimates

• A new study by Gáspár Bakos and colleagues modeled the impact of the proposed 54-meter mirrors, finding they would reach a magnitude of -16.7—roughly four times brighter than a full moon.
• Atmospheric scattering means the light would not just hit the intended target; the surrounding region would experience significant glow, with night skies appearing as bright as dusk for tens of kilometers.
• The company's long-term vision involves a constellation of up to 50,000 mirrors, which could effectively wash out all but the brightest stars.

Regulatory and Ethical Concerns

• Despite over 1,800 formal objections from the astronomical community, the FCC approved the pilot satellite Eärendil-1, citing that light pollution and astronomical interference fall outside their regulatory mandate.
• Critics argue that the project ignores the impact on nocturnal wildlife, migratory birds, and the public's access to dark skies.
• The core issue centers on who has the right to alter the nighttime environment for commercial interests at the expense of global astronomical and ecological heritage.