SpaceX’s 1 Million Satellites: Threat to Night Sky & Orbital Space
Astronomers are warning that SpaceX’s plan to launch one million satellites to power orbital AI data centers threatens to overwhelm the night sky, potentially rendering stars invisible to the naked eye. The proposal, filed with the U.S. Federal Communications Commission (FCC) in January, has sparked concern over the impact on both ground-based and space-based astronomy, as well as the broader environmental consequences of such a massive constellation.
Currently, SpaceX operates between 9,300 and 9,600 active satellites providing Starlink internet service, a number already visible as streaks across the night sky. The proposed expansion to one million satellites represents a factor of 100 increase, and would result in “tens of thousands of moving objects as bright as stars” visible at any given moment, according to astronomer John Barentine, a dark sky consultant working with a group objecting to the plan.
Simulations, updated to account for the proposed constellation, predict that visible satellites could outnumber stars for large portions of the night and year, even at latitudes as low as 50 degrees north. Each simulation shows there will be more visible satellites than stars for large portions of the night and the year. The human eye can typically see fewer than 4,500 stars in an unpolluted night sky, a number that would be eclipsed by the sheer volume of orbiting satellites.
The proposed satellites will operate in higher orbits, between 500 and 2,000 kilometers, meaning they will remain visible for longer periods as they traverse the sky. SpaceX has provided limited details about the satellites themselves, including their size, specific orbits, and associated costs.
Beyond the impact on astronomical observation, concerns are mounting regarding the environmental consequences of launching and maintaining such a vast network. Satellites regularly fall back to Earth during re-entry, and while many burn up in the atmosphere, debris can reach the ground, posing a risk of injury or damage. Increasing satellite density also raises the risk of collisions in orbit. SpaceX suggests that launching data centers into orbit is environmentally preferable to ground-based facilities, but critics argue this ignores the pollution from launches and re-entries, as well as the challenges of dissipating waste heat in space.
SpaceX previously tested a “darksat” mitigation strategy, painting a satellite black to reduce its reflectivity. Yet, the satellite overheated and its electronics failed, highlighting the technical challenges of operating data centers in the harsh environment of space. The company’s proposal does not address how it will coordinate with the FCC to ensure dark and quiet skies, a requirement for existing satellite constellations.
The FCC accepted SpaceX’s filing and opened a four-week comment period, prompting a scramble among astronomers and dark sky advocates to submit objections. The agency’s rapid acceptance of the proposal, despite the limited information provided, has raised concerns about the regulatory process. SpaceX did not include exact orbits, the size or shape of satellites, or casualty risk from de-orbiting in its filing, beyond a promise that it won’t exceed 0.01 percent per satellite.
The proposal underscores the growing tension between commercial space ventures and the preservation of the orbital environment and the night sky. International guidelines for operating in space exist, but are considered inadequate to address the scale of SpaceX’s plan. As of February 2, 2026, the FCC has not responded to the submitted comments, and SpaceX has not publicly addressed the concerns raised by the scientific community.