Went on a field trip to see JWST today and the sunshade? It is literally pink. People need to know. https://images.app.goo.gl/SvUQSJqJzubrTPwWA …
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Yup! The sunshield consists of five layers of Kapton that have vapor-deposited aluminum coatings, the two layers that will be the hottest also have a treated silicon coating that looks pink to reflect the sun's heat back into space. More sunshield info: https://jwst.nasa.gov/content/observatory/sunshield.html …
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And if you want info specifically on the coating: https://jwst.nasa.gov/content/about/innovations/coating.html …
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