From Newsgroup: alt.astronomy
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4,000 Space Mirrors Could Soon Light Up Your Night, and TheyrCOre Coming
in 2026
A bold new startup plans to launch mirrors into orbit to reflect
sunlight onto Earth at night, a move that could outshine the Moon.
Published on January 20, 2026 at 14:15
|
Sarah Jones
Written by Sarah Jones
|
Reading time : 3 minutes
4,000 Space Mirrors Could Soon Light Up Your Night, And They're Coming
In 2026
-- Credit: Reflect Orbital
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A California startup wants to use giant orbiting mirrors to reflect
sunlight onto Earth after dark. The first test satellite is set for
launch in April 2026, but the idea has already sparked backlash from astronomers, environmentalists, and sleep researchers
The company behind the project, Reflect Orbital, envisions a future
where darkness is no longer a limitation. By placing thousands of 55-meter-wide mirrors in low Earth orbit, the startup aims to direct
sunlight onto solar power sites and other critical areas during
nighttime hours. These satellites would follow a sun-synchronous orbit, hugging the line between night and day, to capture and redirect sunlight
even when the surface below has gone dark.
The Unintended Glow Of Space Mirrors
Reflect OrbitalrCOs mirrors are designed to act like massive reflectors, sending diffused beams of light back to Earth. Because the Sun occupies
a significant portion of the sky, the redirected sunlight naturally
spreads over a wide area, reducing the beamrCOs intensity and making it difficult to tightly control.
rCLReflect Orbital is pioneering a new category in-space infrastructure,rCY stated Josh Wolfe, Managing Partner at Lux Capital. rCLWe believe their on-demand illumination technology has the potential to reshape how we
solve problems on EarthrCofrom critical operations to energy resilience.rCY
According to Communications Daily, the first test satellite, called Earendil-1, has already been filed for approval with the Federal Communications Commission, with a launch window in early April 2026. And
as Earth.com explains, light can travel up to 96 kilometers beyond the
target zone due to atmospheric scattering caused by air particles and aerosols.
Simulated Satellite View Of Space Mirror Light Illuminating CaliforniarCOs Coast At Night.
Simulated satellite view of space mirror light illuminating CaliforniarCOs coast at night. Credit: Reflect Orbital
The Night Sky May Never Be The Same
The astronomical community has reacted strongly to the sky mirror
concept, citing the increasing difficulty of conducting uncontaminated observations. According to NASA researcher Dr. Alejandro S. Borlaff,
whose work was published in Nature, light from reflective satellites can streak across telescope images, obscuring faint celestial bodies and interfering with time-sensitive data collection.
Even with software that removes satellite trails from images, the
process often results in lost data in affected areas. Dr. BorlaffrCOs
findings show that one-third of Hubble Space Telescope images are
already impacted by satellite contamination. With the number of
satellites expected to explode in the coming years, concerns about sky brightness and image quality are becoming urgent.
Some experts have estimated that the direct beam from one of these
mirrors could appear up to four times brighter than a full moon. In
nighttime conditions, such brightness could overwhelm sensitive
instruments and make it impossible to detect dim asteroids, galaxies, or transient cosmic events.
Space Mirrors Boost Solar Output At Sunrise And Sunset.
Space mirrors boost solar output at sunrise and sunset. Credit: Reflect Orbital
What Happens To Wildlife When We Light Up The Night?
Many animals, like birds and insects, rely on natural darkness to feed,
rest, or migrate. Earth.com explains that sudden or repeated artificial
light can confuse these rhythms and cause stress. Humans are affected
too, bright light at night can mess with sleep, lower melatonin, and
harm mental health, especially when it comes from the sky and canrCOt be avoided.
ThererCOs also the question of fairness. People living under the mirrors wouldnrCOt get a say, even though the light affects them. The same source noteed that private companies could control when and where the light
appears, but the impact would cross borders. With no global rules in
place, this could quickly become a bigger problem.
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Sarah Jones
Who is the author, Sarah Jones?
Sarah Jones is a writer with a background in media and digital culture.
A graduate of the University of Pennsylvania, she began her career contributing to various online platforms before joining The Daily Galaxy
team in July 2025. SherCOs passionate about exploring how science and technology intersect with everyday life.
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The Daily Galaxy --Great Discoveries Channel is an independent media.
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