Astronomers Warn 1 Million Orbital Data Center Satellites Could Outshine Stars 100-Fold
Updated
Updated · Scientific American · Aug 20
Astronomers Warn 1 Million Orbital Data Center Satellites Could Outshine Stars 100-Fold
3 articles · Updated · Scientific American · Aug 20
Summary
A new preprint modeled proposed orbital data center constellations and found that, in the most extreme case, their reflected sunlight could outnumber visible stars by a factor of 100.
20,000 to 1 million satellites have been proposed to the FCC by companies including SpaceX, Blue Origin and Cowboy Space, with polar twilight orbits favored because they can receive near-constant sunlight.
The study says those megaconstellations would brighten dawn and dusk skies globally, remain visible for much of polar winter, and disrupt optical, infrared and radio astronomy—including observations from Antarctica and space telescopes.
Brightness mitigation can sharply reduce visibility, but astronomers say the sheer number of satellites could still make avoidance impossible, while the FCC largely does not treat satellite light pollution as within its authority.
The warning widens the debate over shifting AI infrastructure into space: orbital data centers may ease pressure on land and power grids, but could export environmental costs to the night sky worldwide.
If a million orbital data centers light up the night, will humanity ever see the natural stars again?
Could moving our data centers to space save Earth's power grid at the cost of destroying ground-based astronomy forever?
With no single global authority to stop them, who truly owns the rights to our shared night sky?
The One Million Satellite Era: The Race for Orbital Data Centers and the Global Battle Over the Night Sky
Overview
Driven by the explosive growth of artificial intelligence and the limits of Earth-based infrastructure, SpaceX and other tech giants are proposing to launch massive constellations of orbital data center satellites. These plans aim to bypass shortages of land, water, and electricity, but would require constant rocket launches and satellite replacements, leading to increased atmospheric pollution and the release of harmful aluminum oxide particles that threaten the ozone layer. The resulting overcrowding in orbit raises the risk of catastrophic collisions, while the bright satellites would permanently brighten the night sky, disrupting astronomy and natural ecosystems. These sweeping changes have triggered regulatory battles and urgent calls for environmental review.