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There is a plan to prevent such a strike—the Space Surveillance Network, a bevy of sensors that the military uses to track space debris. NASA monitors what’s unofficially known as the “pizza box,” a sort of no-fly zone around the ISS. When pieces of debris are predicted to enter the box—if there’s at least a 1 in 100,000 chance of collision—mission controllers order avoidance maneuvers, firing thrusters that move the ISS and dodge the trash. The technique has been used dozens of times since the first ISS module launched in 1998. But the system only tracks about 45,000 larger pieces, and all sensors have noise. Plus, risk thresholds can miss stuff, sometimes badly. In 2025, Chinese astronauts were briefly stranded at their station after debris hit their return vehicle.
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五、人才破局：偏远退休社区，如何留住医护人员？很多人会有疑问：Sun City是退休社区，地处凤凰城郊区，会不会很难吸引专业医护人员？其实，它的人才之路，经历了从“困难重重”到“稳步破局”的过程，核心就在于“找准优势、用对策略”。