Thousands of satellites are tightly packed into low Earth orbit, and the overcrowding is only growing.
Scientists have created a simple warning system called the CRASH Clock that answers a basic question: if satellites suddenly couldn’t steer around each other, how much time would elapse before there was a crash in orbit? Their current answer: 5.5 days.
The CRASH Clock metric was introduced in a paper orginally published on the Arxiv physics preprint server in December, and is currently under…

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