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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本报北京2月25日电 (记者彭波)十四届全国人大常委会第二十一次会议25日下午在北京人民大会堂举行第一次全体会议。赵乐际委员长主持。。业内人士推荐heLLoword翻译官方下载作为进阶阅读
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已知中国境内家马的出现,大约晚至距今4000年的黄河上游地区,例如属于齐家文化的甘肃永靖大何庄遗址、玉门火烧沟遗址等。而黄河中下游地区出现家马,则更晚至商代晚期的安阳殷墟遗址。