Starlink Satellites Continue to Disrupt Astronomical Observations,Despite Brightness Improvements
Washington D.C. – New research confirms that light pollution from Elon Musk’s Starlink satellite constellation continues to pose a meaningful threat to both professional astronomy and public stargazing,even as SpaceX has made some efforts to reduce satellite brightness. The findings underscore a growing concern over the environmental and scientific impacts of large low Earth orbit (LEO) satellite deployments, and come as lawmakers consider redirecting billions in taxpayer subsidies to the company.
While Musk initially claimed in March 2020 that Starlink “isn’t for big cities” and “won’t be a huge threat to telcos,” the situation has evolved. The study reveals that despite some improvements in satellite brightness, the lower orbiting altitude of newer Starlink satellites is actually increasing their impact on the night sky. the Committee on Space Research (CPS) has established recommendations for maximum acceptable brightness for satellites below 341 miles (550 kilometers), and the International Astronomical Union (IAU) has set a maximum brightness of +7 magnitude for professional astronomy and below +6 magnitude to preserve public stargazing experiences.
Beyond astronomy, scientists are increasingly worried about the broader environmental consequences of LEO satellite constellations. Researchers warn that the constant burn-up of satellites in orbit could release chemicals that undermine ozone layer recovery. A recent study from the University of southern California (USC) estimates that at peak, 1,005 U.S. tons of aluminum will fall to Earth annually from burning satellites, releasing 397 U.S. tons of aluminum oxides - a 646% increase over natural levels.
the situation is further complex by a potential influx of taxpayer funding. Republicans are currently attempting to rewrite the 2021 infrastructure bill to redirect billions in broadband subsidies to Starlink, despite the service’s high costs, congestion issues, and growing environmental concerns.Starlink is just one of several companies vying for these subsidies in the rapidly expanding LEO satellite market.
