Hi guys, I made an educational YouTube video about the James Webb Space Telescope. I hope you like it:https://m.youtube.com/watch?v=XBEK_VO0qFQ …
#DYK what #NASAWebb's mirrors are made of? 
While the mirrors are coated with gold, they're built out of beryllium — a lightweight, sturdy metal that holds its shape even in extreme temperatures! Learn more about this metal's role in NASA history: https://go.nasa.gov/3yOMqVC pic.twitter.com/OvqZZNa5y5
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I got to see it as it was being built at Goddard a few years ago. .. hope the launch goes well December
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My favorite metal is tungsten
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select top 1 element_name from elements order by bulk_modulus desc, melting_point desc, density
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Indeed. So many @NASAWebb tweets.
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Beryllium in the lungs can cause the lung damage (called granulomas) of chronic beryllium disease.
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I .lo ve.uoy
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