SpaceX’s 1 Million Satellites: Threat to Night Sky & Orbital Space

The night sky, a shared heritage for all of humanity, is facing an unprecedented threat. SpaceX recently filed plans with the U.S. Federal Communications Commission (FCC) to launch up to one million satellites into low-Earth orbit, ostensibly to provide global AI computing power. While the company frames this as an innovative solution to growing data demands, astronomers and dark-sky advocates warn that such a massive increase in satellite density could irrevocably damage our view of the stars, potentially rendering the night sky unrecognizable.

Currently, over 10,000 Starlink satellites orbit Earth, already visible as crawling streaks across the night sky, even in remote locations. These satellites have already begun to interfere with astronomical observations, appearing as unwanted lines in telescope images. SpaceX has been working on mitigation strategies to reduce the brightness of its satellites, but the proposed million-satellite constellation represents an order of magnitude increase in scale, dwarfing previous efforts.

Predicting a Satellite-Dominated Sky

To understand the potential impact, researchers have developed simulations modeling the night sky with varying numbers of satellites. A 2022 study predicted that with 65,000 satellites from several planned megaconstellations, one in fifteen visible points of light would be a satellite, not a star. In other words that for many observers, the familiar constellations would be increasingly obscured by a network of artificial lights.

Predictions for satellite brightness and positions comparing SpaceX’s proposed one-million-satellite AI data centres with a previously approved 42,000 satellite megaconstellation. (Lawler et al. 2022), CC BY-NC-ND

With one million satellites, the simulations suggest that the number of visible satellites could surpass the number of stars visible to the naked eye – fewer than 4,500 in an unpolluted sky – for significant portions of the night and year, globally. This would fundamentally alter our experience of the night sky, transforming it from a canvas of stars into a web of artificial lights.

Orbital Data Centers and Atmospheric Concerns

SpaceX’s justification for this massive expansion is the need for orbital data centers to power the growing demands of artificial intelligence. The company argues that processing data in space is more energy-efficient than maintaining large data centers on Earth. However, this claim overlooks the significant environmental costs associated with launching and maintaining such a vast satellite network. These include atmospheric pollution from rocket launches and satellite re-entry, as well as the increased risk of collisions in orbit.

Image of a white streak across a dark sky, showing a A SpaceX Falcon 9 rocket carrying 26 Starlink satellites launched from Vandenberg Space Force Base in California. — A SpaceX Falcon 9 rocket carrying 26 Starlink satellites launched from Vandenberg Space Force Base in Calif., flies over Los Angeles in June 2025. (AP Photo/Damian Dovarganes)

Satellites inevitably fall back to Earth, and while SpaceX aims for controlled re-entry, debris can still reach the ground, posing a risk to people and property. The sheer number of satellites increases the likelihood of collisions, creating more space debris and exacerbating the problem. The company’s proposal also lacks a detailed plan for managing the immense heat generated by orbital data centers, a significant technological hurdle.

SpaceX has made some efforts to mitigate the brightness of its satellites, such as using modern coatings. However, the proposed AI data center satellites are expected to be larger and more powerful, potentially negating these improvements. The company’s filing to the FCC lacks a comprehensive plan for coordinating with astronomers to minimize interference, despite years of collaboration on mitigation strategies.

A Finite Resource and the Need for Regulation

The current regulatory framework governing space activities is inadequate to address the challenges posed by these massive satellite constellations. While international guidelines exist, they are often non-binding and lack effective enforcement mechanisms. The need for stronger international cooperation and regulation is becoming increasingly urgent.

The proposed one million satellite constellation represents a fundamental shift in our relationship with the night sky. This proves a reminder that orbital space is a finite resource, and that its use must be carefully considered to protect the shared heritage of humanity. Allowing a single corporation to dominate access to space and potentially destroy our view of the stars would be a profound loss for everyone on Earth.

The FCC is currently reviewing SpaceX’s proposal. The outcome of this review will have far-reaching consequences for the future of astronomy, space exploration, and our connection to the cosmos.