Low-Earth orbit is crowded enough now that close approaches among mega-constellations happen about once every 22 seconds, and a new study warns the system is starting to look like a house of cards. Sarah Thiele, a researcher at Princeton and formerly a PhD student at the University of British Columbia, said the constant maneuvering needed to keep satellites apart is no longer optional.
The numbers are stark. Inside Starlink alone, close approaches happen roughly every 11 minutes, and each satellite reportedly performs an average of 41 course corrections a year. The paper says the Gannon Storm in May 2024 forced more than half of all satellites in low Earth orbit to spend fuel on adjustments, showing how quickly the whole network can be stressed when conditions change.
That matters because low Earth orbit is getting more crowded by the year, and the study argues the traffic pattern is now dense enough that routine avoidance has become a standing part of operations. Solar storms can heat and expand Earth's upper atmosphere, increasing drag and pushing satellites lower faster, while also making their positions harder to pin down. In a field built on precision, that is a problem that compounds quickly.
The friction point is that the same storms that nudge satellites off course can also knock out the systems meant to keep them safe. Solar storms can interfere with navigation and communications, and satellites may lose the ability to receive commands or coordinate avoidance maneuvers at the very moment they need them most. That leaves operators trying to manage a swarm that depends on constant correction while facing a rare but serious disruption that can scramble the whole picture at once.
The study's answer is blunt: crowded low-Earth orbit is already being held together by a steady stream of fuel-burning adjustments, and a major solar storm can expose how fragile that arrangement is. The question is not whether operators will need to keep maneuvering, but how long the system can absorb those shocks before one bad day becomes too costly to manage.