04版 - 今年1月全国查处违反中央八项规定精神问题22554起

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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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Credit: Samsung

“二九暝”(注:闽南语的“除夕夜”)前的十几天,这张便签可能出现在家里的各个角落,随着她的日夜斟酌和食材价格变化,不时涂改调整。有一回,我甚至在厕所见到这张便签纸。

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