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Big Room, Big Vacuum

机译:大房间,大真空

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摘要

One of the biggest challenges in building the James Webb Space Telescope will be testing it, given that it will have a sunshield twice the size of Center Court at Wimbledon and the world's biggest mirror put in orbit. NASA and Northrop Grumman Space Technology want no replay of the mirror aberration fiasco on the Hubble Space Telescope. They also have no chance to repair or upgrade the James Webb from its second Lagrangian point orbital position, unlike the Hubble, which is reachable by the space shuttle. If the spacecraft's sunshield fails, if its segmented mirror aligns poorly, if the telescope can't achieve a critical pointing accuracy―then the space agency is likely to lose a $1.6-billion investment and astronomers the instrument they need to investigate the first minutes of the Big Bang.
机译:建造詹姆斯·韦伯太空望远镜的最大挑战之一就是对其进行测试,因为它的遮阳罩的大小是温布尔登中心球场的两倍,并且是世界上最大的镜子。美国国家航空航天局(NASA)和诺斯罗普·格鲁曼太空技术公司(Northrop Grumman Space Technology)不想在哈勃太空望远镜上重演镜像差惨败。他们也没有机会将詹姆斯·韦伯从拉格朗日点的第二轨道位置进行修复或升级,这与哈勃望远镜不同,后者可以通过航天飞机到达。如果航天器的遮阳板发生故障,如果其分段镜对准不佳,如果望远镜不能达到关键的指向精度,那么航天局很可能会损失16亿美元的投资,而天文学家则需要他们调查前一分钟的仪器。大爆炸。

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