Tech firms including SpaceX and Blue Origin have sought FCC permission to deploy millions of compact 'orbital data centers' in low Earth orbit. Scientists warn that, despite small internal modules, each unit's large solar arrays and radiators could make it comparable in size to the ISS and that swarms could brighten the night sky. Researchers point to a NOAA study suggesting aluminum from reentering hardware could reach the stratosphere, potentially altering winds and damaging the ozone layer. A coalition has petitioned the FCC for a comprehensive environmental review before such deployments proceed.
Orbital Data Centers Could Be 'Catastrophic' for Earth, Scientists Warn
Space data centers could be ‘catastrophic’ for planet, scientist says
Tech companies have proposed moving large portions of computing infrastructure into low Earth orbit by deploying millions of compact 'orbital data centers.' While these platforms promise to sidestep local resistance to ground-based data centers, scientists and environmental groups warn the scale of the plans could have serious and lasting environmental consequences.
What Are Orbital Data Centers?
Companies including SpaceX and Blue Origin have filed requests with the Federal Communications Commission seeking authorization to place swarms of small computing units in orbit. Each unit would contain compact computing modules but would also require very large solar arrays to generate power and extensive radiator surfaces to shed heat.
Size, Scale, And Orbits
Although the internal server components are small, the supporting structures (solar panels and radiators) would make each platform far larger than the computing enclosure itself. According to Cole Donovan, director of science policy and advocacy at Stand Up for Science, an individual orbital data center could be roughly 70% the size of the International Space Station. The proposed deployments envision many such platforms forming constellations that circle the planet about once every 90 minutes.
Environmental And Night-Sky Concerns
Ruskin Hartley, executive director of DarkSky International and a leader of the coalition that petitioned the FCC, warns these projects 'could permanently alter the night sky as we know it.' Large numbers of reflective panels in low orbit could increase brightness and interfere with astronomical observations and public enjoyment of dark skies.
Atmospheric Risks From Reentry
Scientists also caution about what happens when hardware from these platforms reenters the atmosphere. Unlike many small satellites that largely ablate on reentry, components used in orbital data centers—particularly aluminum—may survive long enough to inject particulate material into the upper atmosphere. Researchers point to a study from the NOAA Chemical Sciences Laboratory that projects aluminum emissions at the scales under discussion could be sufficient to alter atmospheric dynamics, potentially changing wind patterns and affecting the ozone layer.
'The amount of aluminum entering the atmosphere under projections for these data centers could change the Earth's winds, as well as potentially have impacts on the ozone,' the NOAA study warned.
In response, a coalition of scientists and environmental organizations has petitioned the FCC, urging a thorough regulatory and environmental review before any large-scale deployment proceeds. The petition calls for more research into atmospheric impacts, reentry behavior, and light pollution from massive orbital constellations.
Bottom line: While orbital data centers could shift where computing infrastructure is sited, experts say the proposed scale raises unresolved environmental risks—particularly to the night sky, atmospheric chemistry, and the ozone layer—that warrant careful regulatory scrutiny.
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