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Why did NASA coat this telescope in pure gold?
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--- FOOTAGE CREDITS (Educational Fair Use) ---
• Footage courtesy: tech_shark (@tech_shark-w4y) — https://www.youtube.com/watch?v=isvrjpqbkak
• Footage courtesy: BBC Earth Science — https://www.youtube.com/watch?v=8jA3ArOQE0E
• Footage courtesy: National Geographic (@NatGeo) — https://www.youtube.com/watch?v=MjUcBWYVF9s

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Learning
Transcript
00:00The James Webb Space Telescope hunts dying stars across the freezing void right now.
00:06Capturing invisible infrared light requires massive beryllium mirrors
00:10polished to atomic smoothness without a single flaw.
00:14Intuition suggests common metals like durable aluminum
00:18would shield the fragile optics from harsh solar radiation.
00:21While aluminum reflects visible light,
00:24gold reflects infrared light far more efficiently,
00:28prompting engineers to vaporize pure gold onto the mirrors.
00:32This microscopic gold layer reflects ancient starlight
00:36while the James Webb Space Telescope hunts dying stars across the freezing void right now.
00:42By the way, this channel is automated.
00:45You sleep, it posts.
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