The night sky is under siege, and it’s not just from light pollution. Amazon’s Leo satellites are joining the ranks of celestial intruders, sparking concerns among astronomers who fear these orbiting devices could disrupt our view of the cosmos. Sound familiar? Yes, just like SpaceX’s Starlink, Amazon’s constellation is facing scrutiny for its brightness—a problem many had hoped would be avoided this time around. But here’s where it gets controversial: despite efforts to dim these satellites, new research suggests they’re still shining brighter than astronomers would like, potentially interfering with critical observations.
A recent study by astronomers affiliated with the International Astronomical Union (IAU) analyzed nearly 2,000 observations of Amazon’s Leo satellites, which began launching last year. The findings? A staggering 92% of these satellites exceeded recommended brightness guidelines when they reached their operational altitude of 630 kilometers. While most are still too dim to be seen with the naked eye (only about 25% are visible without aid), the issue isn’t just about what we can see. Telescopes, far more sensitive than the human eye, can detect even fainter objects, and these satellites are crossing a line astronomers had hoped to protect.
But this is the part most people miss: the IAU has been urging satellite operators to reduce brightness beyond the ‘aesthetic limit’ of magnitude 6—the point at which objects become visible to the unaided eye. Instead, they’re pushing for a threshold of magnitude 7 or fainter to ensure telescopes remain undisturbed. Amazon’s Leo satellites, with an average magnitude of 6.28, are falling short of this goal. And this isn’t just a theoretical concern—it’s already affecting astronomical research.
Adding to the controversy, Amazon’s satellites share ‘reflective characteristics’ with early Starlink models, which have been notorious for photobombing astronomical images. SpaceX has since taken steps to address this, such as applying ‘mirror film’ and painting satellites black. Amazon claims it’s doing the same, using anti-reflective coatings and custom dielectric films on its Leo satellites. But is it enough? With 180 satellites already in orbit and plans for over 3,200 more, astronomers are watching closely—and hoping for improvements.
Here’s the bigger question: Can satellite operators ever fully meet the astronomical community’s brightness guidelines? Last year’s research suggests most new constellations are falling short, raising doubts about whether these goals are even achievable. Amazon remains optimistic, citing ongoing collaboration with scientists and promising further improvements as more satellites reach their assigned altitudes. They’ve even signed an agreement with the U.S. National Science Foundation to minimize interference. But as the skies grow more crowded, the tension between technological progress and scientific preservation is only intensifying.
So, what do you think? Are companies like Amazon and SpaceX doing enough to protect our view of the cosmos, or is this a battle astronomers are destined to lose? Let’s hear your thoughts in the comments—this debate is far from over.
