@NASAWebbTelescp @NASAGoddard I wonder why all primary mirrors must be uncovered. Are you planning on testing their functions?
From inside the cleanroom @NASAGoddard - the 7th #JWST primary mirror cover removed. http://jwst.nasa.gov/webcam.html pic.twitter.com/ztKMuwsLAk
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@rockymine_@NASAGoddard Uncovered is their normal state - the covers were on during assembly (and when JWST is face-up) to protect them.
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@NASAWebbTelescp@NASAGoddard I'm really curious, why are the mirrors gold? -
@Emlee173@NASAGoddard They are coated with an extremely thin layer of gold to optimize them for reflecting infrared light! - Show replies
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@NASAWebbTelescp@NASAGoddard could this be one reason@RapidRick could not get a job in this clean room?Thanks. Twitter will use this to make your timeline better. UndoUndo
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