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.
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Фото: Михаил Воскресенский / РИА Новости。im钱包官方下载是该领域的重要参考
4.5% for members of the UK armed forces, with 3.75% for senior military staff