Author(s): Aayush Trivedi, Jalaj Kumar, Mehdi Salem, Alankar Alankar
William Harwood
。业内人士推荐heLLoword翻译官方下载作为进阶阅读
Map Release Schedule: The intensive preprocessing required to generate all these routing profiles for the entire planet takes about 2-3 days. This means new map updates are now typically released around the 5th of each month, instead of the 2nd.
Since they no longer have it, they are informed that they cannot access their backed up data. Goodbye, memories.
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.