@CougerMom @NASAWebb's Mirrors Are Made of Beryllium Because It's Stable Across a a Wide ... - Latest Tweet by NASA
The latest Tweet by NASA states, '@NASAWebb’s mirrors are made of beryllium because it's stable across a a wide range of temperatures. They’re then coated in a thin layer of gold to improve the mirror's reflection of infrared light. Here's more info: ...'
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