We'll rotate #JWST so the mirrors are face-down to install the instruments behind the primary mirror. So the covers are coming off!
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@NASAWebbTelescp Before launch, will it be tested on the ground facing the sky to check all instruments and mirrors are working fine?
.@kool_duderex We'll do end-to-end testing of the whole telescope (at cryo temps) at @NASA_Johnson next year.pic.twitter.com/dA9yeCazVF
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@NASAWebbTelescp@NASA_Johnson I am so curious to see it in action. :D Like#Hubble the ultra deep field of JWST would be awesome.Thanks. Twitter will use this to make your timeline better. UndoUndo
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