This launch will be the most stressful ever 
#NASAWebb has successfully cleared another critical testing milestone, taking this ambitious observatory one step closer to launch in 2021.
More about Webb's recent thermal vacuum testing here: https://go.nasa.gov/2HMecKi pic.twitter.com/YGRYKFybYn
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A small bug and years and years of S&D thrown away
End of conversation
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Why so few likes?! Tragedy.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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