Imagine a night sky so cluttered with satellites that our view of the cosmos is forever altered. This isn’t science fiction—it’s a looming reality, and scientists are sounding the alarm. The rapid deployment of hundreds of thousands of satellites threatens not only ground-based astronomy but now, as a new study reveals, even space telescopes like the iconic Hubble. But here’s where it gets controversial: while these satellites promise to revolutionize global internet access, their impact on scientific research and our cultural connection to the stars could be irreversible.
Satellite constellations, networks ranging from dozens to tens of thousands of satellites, have already begun interfering with ground-based telescopes. Now, a study published in Nature (https://www.nature.com/articles/s41586-025-09759-5) warns that space-based telescopes are next in line. The Hubble Space Telescope, renowned for its breathtaking images of galaxies and nebulas, has also made groundbreaking discoveries, such as measuring the universe’s expansion rate. But this legacy is at risk if the proposed satellite megaconstellations from companies like SpaceX and Amazon come to fruition.
The study’s authors focused on Hubble, NASA’s SPHEREx (https://www.jpl.nasa.gov/missions/spherex/), the European Space Agency’s ARRAKIHS (https://www.arrakihs-mission.eu/), and China’s Xuntian telescope (https://www.universetoday.com/articles/chinas-flagship-space-telescope-launches-in-2027-heres-how-itll-change-cosmology). Their findings are startling: if 560,000 satellites are launched in the next decade, 39.6% of Hubble’s images and a staggering 96% of the other telescopes’ images would be affected. These satellites create streaks of light across images and interfere with radio astronomy by emitting low-frequency electromagnetic radiation.
Lead author Alex Borlaff, a NASA research scientist, recalls a time when spotting a single satellite in a night’s observation was rare. ‘Now, it’s becoming way too common,’ he says. The problem has escalated in recent years, with satellites even crossing the paths of space telescopes like Hubble. Borlaff and his team calculated that during a typical exposure, Hubble could see 2.14 satellites, SPHEREx 5.64, ARRAKIHS 69, and Xuntian a whopping 92.
And this is the part most people miss: the satellite boom isn’t just about SpaceX’s Starlink. Amazon’s Kuiper constellation plans 3,200 satellites, OneWeb has 632 in the works, and China aims to launch 14,000. These satellites, primarily designed to improve internet access, are here to stay—but at what cost?
Ground-based observatories can temporarily pause research when satellites pass by, but it’s a cumbersome workaround. Space telescopes, however, don’t always have that luxury. If 96% of observations are disrupted, as the study suggests, ‘then we may have a problem,’ Borlaff warns.
Some argue that telescopes like the James Webb Space Telescope, orbiting far beyond low Earth orbit, will remain unaffected. But for others, relocating to higher orbits isn’t feasible. ‘We’re just going to have to build space telescopes farther away,’ suggests astrophysicist Aaron Tohuvavohu. Yet, Borlaff counters that this would skyrocket costs, already in the billions, and some telescopes are specifically designed for low Earth orbit.
The implications go beyond science. What happens to our shared cultural heritage of the night sky? Tohuvavohu worries about the impact on our ability to simply look up and marvel at the stars. ‘I find myself thinking about that much more often than the impact on my research,’ he admits. Borlaff adds that satellites could confuse migratory birds and, at the end of their life, pollute the atmosphere with soot and vaporized metals (https://www.cbc.ca/news/science/satellites-polluting-atmosphere-1.7239899).
There’s also a deeper cultural loss. ‘The sky and the stars have guided humanity for generations,’ Borlaff reflects. ‘Space is for everyone, and this will affect everybody.’
So, here’s the question: Is the trade-off between global internet access and the preservation of our night sky worth it? Should we prioritize technological advancement at the expense of scientific discovery and cultural heritage? Let us know your thoughts in the comments—this debate is far from over.
