But what if it’s not fine? Even back in 1996, before a single component of the ISS was launched into orbit, NASA foresaw the possibility of an even worse worst-case scenario: an uncontrolled reentry. The crux of this scenario involves multiple systems failing in an improbable but not completely impossible cascade. Cabin depressurization could damage the avionics. The electrical power system could go offline, along with thermal control and data handling. Without these, systems controlling coolant and even propellant could break down. Unmoored, the ISS would edge slowly toward Earth, maybe over a year or two, with no way to control where it is headed or where its debris might land. And no, we could not save ourselves by blowing the station up. This would be extremely dangerous and almost certainly create an enormous amount of space trash—which is how we got into this hypothetical mess in the first place.
They had been living and working aboard the ISS since August and were expected to stay until February. The crew returned on January 15, which was a decision made by NASA's chief health and medical officer. Once the crew had landed, administrator Jared Isaacman said it was a "serious situation" but didn't go into any detail.
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To fix that, NASA is redefining the Artemis campaign as a step‑by‑step test program. The agency now aims to launch roughly once every 10 months, standardize its rocket configuration, and rebuild in‑house expertise that has withered over time.
以色列国防军发言人德夫林当地时间2月27日发表声明称，目前以军针对以色列民众的防御指南没有任何改变。。业内人士推荐im钱包官方下载作为进阶阅读
Мощный удар Израиля по Ирану попал на видео09:41
東部戰區應對台海與東海局勢，在當前台海緊張與中日關係趨冷的背景下尤為關鍵。楊志斌曾長期在東南沿海空軍系統任職，擔任過空軍福州指揮所司令員、南部戰區副司令員等職，對台海局勢知之甚詳。，推荐阅读Line官方版本下载获取更多信息