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Fully deployed, the telescope’s sunshield measures almost 70 ft by 47 ft (21 m by 14 m). When stowed inside the rocket for launch, the folded sunshield will be packaged in a very confined area to fit the 18-ft (5.4-m) diameter rocket fairing. 
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In space, one side of the sunshield will always reflect light and heat from the Sun, Earth & Moon. The other side will always face deep space, experiencing temperatures cold enough to freeze oxygen solid.pic.twitter.com/2LdZ6uAsE4
Up next for #NASAWebb: the final mirror fold! Launch is targeted for October 2021. (This image is from Webb's previous mirror deployment in March 2020.)
Latest news: http://go.nasa.gov/3g2x5Kz pic.twitter.com/0IpEh1RdyW
Diamond in the sky.
With all my hearth I give it to: sendingpower. Proof my wide Range telepatical abilities.
I read the telescope would always be in dark behind the earth never to face the sun! Having exposed to sunlight through the film, will it not heat up even a little bit? How would that affect the performance of telescope if that happens?
The telescope won't be directly behind the Earth -Webb actually will almost never be in Earth's shadow. The sunshield is what blocks the Sun, not the Earth. Sunlight can't get through the 5 layer sunshield - its shade keeps the telescope at cryogenic temps!
Amazing. I love science.
It won't get hit by space rock's? It looks fragile
Tonight will be clear, as if there is a bright moon in it, silent and silent, with neither cold nor heat, and it is not permissible for a planet to be thrown into it until sunrise "Muhammad is the Messenger of God"
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Engineers have successfully folded and packed 
