Spectacular aurora captured from space by Russian cosmonaut – video

· · 来源:zz资讯

听闻一桩事:某人在网上对他人点名道姓批骂,之前还有所克制,后来见人没有回应,他胆子壮大了,连篇累牍,捏造事实,什么话伤人,就拣什么话来骂。没想到,人家一纸诉状给告了,某人便急了,急忙去求情,请人宽容:大人不记小人过。那模样,全然没有了当初网骂的嚣张气焰。

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.,这一点在快连下载安装中也有详细论述

2026 年

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两家北美采购钇用于生产涂层的企业高管表示,因拿不到足够原料,不得不短暂停产,其中一家公司还开始拒绝较小及境外客户订单,将有限供应优先保证包括部分发动机制造商在内的大客户。

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