WASHINGTON, November 6, 2026: A US-based space technology company has proposed an ambitious project to reflect sunlight onto selected areas of Earth after sunset using giant mirrors positioned in orbit, potentially extending solar power generation into nighttime hours.
California-based Reflect Orbital plans to deploy large reflective mirrors in low Earth orbit, directing sunlight towards specific locations on the planet even when those areas are experiencing darkness.
The proposal, discussed in research published in The Astrophysical Journal Letters, has attracted attention for its potential applications in renewable energy and disaster relief, while raising concerns about light pollution and its impact on astronomical observations.
According to the company, the technology could allow solar power installations to generate electricity beyond daylight hours by providing additional reflected sunlight.
It could also be used to illuminate disaster-hit regions where conventional electricity supplies have been disrupted, potentially supporting emergency and rescue operations.
How will space mirrors provide sunlight at night?
Under the proposed system, Reflect Orbital would deploy mirrors measuring approximately 18 by 18 metres in low Earth orbit.
The mirrors would be positioned to capture sunlight and redirect it towards designated locations on Earth’s surface.
Their orientation would need to be continuously adjusted as the satellites move through orbit to keep the reflected light directed towards the intended area.
During initial demonstrations, the company aims to illuminate an area approximately five kilometres wide.
Reflect Orbital has also reportedly signed an agreement with rocket manufacturer Skyroot Aerospace for two launches associated with the project.
The company says the reflected light during the initial phase would be comparable to moonlight, although it expects greater illumination and longer coverage periods as more satellites become operational.
Company targets 50,000 satellites by 2035
Reflect Orbital’s long-term ambitions extend beyond a limited number of orbital mirrors.
The company aims to establish a network of approximately 50,000 satellites by 2035, potentially allowing sunlight to be redirected towards multiple locations.
Such a system could, in theory, provide additional illumination for solar energy facilities and areas requiring temporary lighting.
However, the practical effectiveness of the technology for electricity generation would depend on the intensity, duration and reliability of the reflected sunlight.
Astronomers raise concerns over light pollution
Despite its proposed benefits, the project has faced opposition from astronomers and environmental organisations concerned about its potential effects on the night sky.
Research published in August 2025 examined how sunlight reflected from space-based mirrors could scatter as it passes through Earth’s atmosphere.
Critics argue that deploying large numbers of reflective satellites could increase artificial illumination at night, interfere with astronomical observations and disrupt natural darkness.
The company reportedly received regulatory approval in July 2026, but opponents have urged the US Federal Communications Commission (FCC) to reconsider the decision.
Astronomers and environmental advocates warn that a large orbital network could introduce additional challenges for ground-based telescopes and efforts to preserve dark skies.
The proposal highlights a growing debate over the use of orbital infrastructure for commercial and environmental purposes, particularly as companies explore new ways to expand access to renewable energy.
While Reflect Orbital presents its technology as a potential solution for extending solar power availability, its environmental implications and technical feasibility remain important questions as the project moves towards testing.