sometimes available only in that denomination), you had the ability to retrieve
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.
，更多细节参见夫子
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“小马来了，心里就踏实了。”王守芬说。马怀龙特意买来红灯笼，帮老人挂好。王守芬的脸上笑开了花，但又嘱咐起马怀龙：“小马，你可别再买这买那了，你那些工资，可都搭在我们这里了。”