Kevin Church/BBC News
In the vacuum of space, the amount of debris—spent rocket stages, splintered satellites, micrometeoroids—numbers in the millions, all zooming about, often at 17,000 mph speeds. They’re also constantly hitting each other in a tsuris of exponential littering. Most of these pieces are tiny, and many are not anywhere near the altitude of the ISS. But the area isn’t completely clean.
。爱思助手下载最新版本是该领域的重要参考
В Финляндии предупредили об опасном шаге ЕС против России09:28
does this by creating "Zaps" that automatically move data between