Astronomers are deeply worried that a planned array of 50,000 mirror-bearing satellites in orbit will severely compromise telescopes.

Reflect Orbital wants to direct sunlight at night with a network of satellites.

The FCC approved one Reflect Orbital space-mirror test, not the company’s proposed large satellite constellation.

Si l’idée semble séduisante sur le papier, les astronomes et experts de l’espace tirent la sonnette d’alarme.

A California startup called Reflect Orbital is seeking approval to launch a constellation of up to 50,000 mirrors into low Earth orbit. The mirrors would reflect sunlight to the night side of the planet, potentially illuminating areas 3 to 4 miles wide with brightness ranging from full moon to full noon. The company aims to extend solar farm operations after sunset, assist rescue workers, and support other applications. However, scientists from various chronobiology and sleep research societies have raised serious concerns in letters to the US Federal Communications Commission. They argue that the project would significantly alter the natural nighttime light environment on a planetary scale, potentially disrupting human circadian rhythms, sleep patterns, and overall health. Experts highlight that even low levels of light pollution can affect biological clocks, leading to broader health consequences similar to those experienced in regions with extended daylight. Additionally, increased satellite numbers could exacerbate sky glow, already up by about 10% from existing satellites, interfering with astronomical observations and navigation for birds, insects, and other wildlife. Environmental groups like DarkSky International warn of compounded light pollution if combined with SpaceX's plans for a million satellites. Potential risks also include higher collision probabilities in orbit and atmospheric pollution from satellite operations. The FCC is currently reviewing the proposal for an initial test satellite launch as early as this summer. While the technology promises innovative solutions for energy and lighting, critics emphasize the need for thorough assessment of its global impacts before proceeding.

YouTube video by Paul Beckwith

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