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How much gold is in the James Webb Space Telescope? (Synopsis)

5 Apr 2017, 14:15 UTC
How much gold is in the James Webb Space Telescope? (Synopsis) NASA / Chris Gunn
(200 words excerpt, click title or image to see full post)

If you take a look at the James Webb Space Telescope, the most visually striking feature of all is the gold mirrors. Yet gold would make an absolutely terrible material for constructing these mirrors! For very sound scientific reasons, the vast majority of these mirrors are made out of beryllium, not gold, and gold doesn’t even enter the equation until after the first and second polishings.

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