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File:James Webb telescope sunshield.jpg

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English: NASA: The Sunshield on NASA's James Webb Space Telescope is the largest part of the observatory—five layers of thin membrane that must unfurl reliably in space to precise tolerances. Last week, for the first time, engineers stacked and unfurled a full-sized test unit of the Sunshield and it worked perfectly.

The Sunshield is about the length of a tennis court, and will be folded up like an umbrella around the Webb telescope’s mirrors and instruments during launch. Once it reaches its orbit, the Webb telescope will receive a command from Earth to unfold, and separate the Sunshield's five layers into their precisely stacked arrangement with its kite-like shape.

The Sunshield test unit was stacked and expanded at a cleanroom in the Northrop Grumman facility in Redondo Beach, California.
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来源 http://www.nasa.gov/content/goddard/nasas-webb-sunshield-stacks-up-to-test/#.U9PIrfldXJZ
作者 Chris Gunn - NASA Goddard Space Flight Center
Chris Gunn    wikidata:Q110278636
 
Chris Gunn
描述 美国摄影师
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creator QS:P170,Q110278636

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Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
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当前2014年7月26日 (六) 15:312014年7月26日 (六) 15:31版本的缩略图4,928 × 3,280(645 KB)Liandrei{{Information |Description ={{en|1=NASA: The Sunshield on NASA's James Webb Space Telescope is the largest part of the observatory—five layers of thin membrane that must unfurl reliably in space to precise tolerances. Last week, for the first time...

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