I Spoke to Astrophysicists About Starlink’s Expansion. Here’s the Doomsday Scenario Keeping Them Up at Night
Starlink's new FCC approval for 7,500 more satellites aims to boost service and capacity for millions. But at what cost?
Joe Supan, a senior writer for CNET covering home technology, broadband, and moving, delves into the concerns of astrophysicists regarding Starlink's expansion. The Federal Communications Commission's approval of 7,500 additional satellites could have significant consequences, including potential harm to Earth's atmosphere.
Despite the approval, scientists express alarm. Astrophysicist Jonathan McDowell highlights the environmental impact of satellite constellations, emphasizing the need for deliberate action. The authorization will nearly double Starlink's satellite count to 15,000 by 2031, raising concerns about collisions and overreliance on satellite communications.
McDowell predicts further requests for satellite launches, with China and other companies contributing to the growing number. The current 40,000 tracked objects in space, plus the untracked ones, pose a challenge. Vishnu Reddy, a professor at the University of Arizona, warns about the risks of sub-10 centimeter objects that aren't tracked.
FCC Chair Brendan Carr celebrates the approval, claiming it will enhance American technology leadership and broadband connections. However, the order acknowledges the incremental approach, focusing on 15,000 satellites. The FCC predicts improved services and symmetrical speeds, but also authorizes SpaceX to lower satellite orbits, potentially increasing vulnerability to solar storms.
The Kessler Syndrome, a doomsday scenario, looms large. It involves space debris causing a chain reaction, leading to a cluttered orbit and satellite inoperability. SpaceX's risk mitigation maneuvers, though effective, contribute to the challenge of situational awareness. The high number of maneuvers makes it difficult for operators to predict satellite locations.
The environmental impact of satellite reentry is another concern. A study found that a 550-pound satellite releases 66 pounds of aluminum oxide nanoparticles during reentry, with a projected yearly excess of more than 640% over natural levels. This could significantly alter the stratosphere's composition.
Solar storms pose risks to satellites in lower orbits. Sascha Meinrath, a professor at Penn State University, warns of potential network performance degradation and satellite deorbiting. The self-driving algorithms of satellites may amplify storm impacts, requiring careful management.
Starlink's expansion is not the only concern. China's plans for 200,000 satellites and Amazon's Project Leo add to the complexity. While Starlink aims to improve connectivity, it has yet to meet the FCC's broadband standards. The benefits of high-speed internet must be balanced with the potential risks of satellite expansion.
