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.
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时代引领力日益彰显。习近平外交思想不断深化对人类社会发展规律的认识，把握历史前进的逻辑，指明人类进步的方向。高举一面旗帜，明确了构建人类命运共同体是世界各国人民前途所在，是新时代中国特色大国外交追求的崇高目标，擘画了人类迈向更美好未来的愿景和路径。明确两大主张，用“平等有序”回答世界多极化向何处去，用“普惠包容”校准经济全球化过程中出现的各种偏差，倡导各国在发展好自己的同时增益世界繁荣，推动世界从变乱交织走向长治久安。相继提出全球发展倡议、全球安全倡议、全球文明倡议、全球治理倡议，谋求开放创新、包容互惠的发展前景，营造公道正义、共建共享的安全格局，促进和而不同、兼收并蓄的文明交流，推动构建更加公正合理的全球治理体系，为回应人类面临的新挑战贡献了系统全面的中国方案。