Mostly. This is because, theoretically, we could still save the ISS and move it into higher orbit. NASA has calculated that propelling the station more than 640 kilometers above Earth would keep it alive for 100 years—and also require at least 18.9 metric tons of propellant. That’s roughly 2,000 airline carry-ons. A thousand years would require at least 36 metric tons. If that doesn’t seem like very much, consider the fact that, right now, no vehicle can transport that amount of gas to the station. The still-in-development SpaceX megarocket Starship might be able to haul a significant percentage, but it would struggle to dock with the station, according to the space agency’s estimations.
Фото: Leon Neal / Getty Images
FT Professional,详情可参考91视频
Что думаешь? Оцени!
,更多细节参见heLLoword翻译官方下载
「春節是中國文化的超級IP,馬年春節即將來臨。數據顯示,最近兩周外國游客春節來華機票預訂量同比增長超過400%。我們熱忱歡迎外國朋友來中國過春節,體驗熱情友好,感受溫暖喜慶。」林劍說。
Photograph: Simon Hill。关于这个话题,夫子提供了深入分析