Space mirror plans could affect night sky
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The gist
Reflect Orbital plans to launch space mirrors that could brighten night sky 3-4x. Astronomers warn faint celestial objects would become unobservable.
Background
Reflect Orbital, a California-based startup, plans to deploy a constellation of space mirrors to reflect sunlight to Earth on demand, aiming for 50,000 satellites by 2035. A new study warns that these mirrors could unintentionally brighten the night sky by three to four times, obscuring faint celestial objects and disrupting astronomy and ecosystems. The FCC has authorized a demonstration launch later this year, despite objections from the European Southern Observatory.
How it unfolded
- Aug 20, 2026A study warns that if all 50,000 space mirror satellites are deployed, the night sky could brighten by three to four times, obscuring faint celestial objects.
- Aug 21, 2026MIT Technology Review reports that combining beams from 400 satellites could shine as bright as 10,000 full moons, visible up to 80 kilometers away.
- Aug 22, 2026The Download newsletter highlights the potential threat to night skies, noting Reflect Orbital plans a test satellite later this year.
Who’s saying what
- Researchers
- Deploying these mirrors would be seriously damaging for astronomy and the nighttime environment, with damage extending far beyond the target area.
- Astronomer
- The results are not surprising but useful; the modeling is well done.
- Company
- The technology could extend sunlight for solar panel charging, emergency response, and military activities.
Still unverified
Reflect Orbital's claim that light will be contained to target customers is physically impossible according to experts, but the company has not publicly responded to this specific criticism.