European report warns rising satellite numbers heighten Kessler syndrome risk
A new European report examines the growing risk of orbital collisions as active satellites have surged from roughly 1,000 in 2013 to about 17,000 today, according to CelesTrak. SpaceX's Starlink constellation accounts for most of this growth with around 11,000 satellites, while Amazon, Chinese internet constellations, and planned orbital data centers are set to add many more.
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The rapid increase in satellites raises questions about whether orbits can remain usable as congestion grows, echoing the cascading-collision scenario first theorized by NASA scientists Donald Kessler and Burton Cour-Palais decades ago. Experts appear divided on how severe the risk currently is, suggesting the debate over sustainable orbital use will intensify as more constellations and mega-projects launch.
- Active satellites have grown from about 1,000 in 2013 to roughly 17,000 today.
- SpaceX's Starlink constellation, with about 11,000 satellites, drives most of this growth.
- Amazon, Chinese constellations, and planned orbital data centers could add hundreds of thousands more satellites.
Source: arstechnica.com, 2026-09-23
Published there as: “A new report from Europe raises serious alarms about orbital collisions”
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