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10 Unbelievable Facts About NASA’s James Webb Space Telescope
Here's a list of ten mind-blowing facts about the James Webb Tele
scope, which will change the route of space exploration for human beings and blow your mind.
1.) The James Webb Space Telescope is actually lighter than its p
redecessor, which was Hubble Space Telescope.
2.) James Webb's mirrors were the largest and lightest telescope
mirrors of all time.
3.) While they look as if they are made of gold, James Webb's mir
rors are actually made of beryllium.
4.) The total gold content within the mirrors of James Webb's Spa
ce Telescope amounts to just 48 grams, which is less than 2 pounds.
5.) The gold is not directly exposed to the Sun; it's covered wit
h an amorphous layer of thin silicon dioxide.
6.) The Telescope side of James Webb will passively cool itself t
o ~50K degrees: cold enough to liquify nitrogen.
7.) With active cryogenic cooling, Webb can get all the way to ~7
8.) Contrary to NASA's Spitzer, which changed into the "warm" mis
sion after it could not replenish coolant, James Webb will maintain its cool temperatures throughout its duration.
9.) If it's running out of fuel, its destiny is to remain in the
"graveyard orbit" around the Sun.
10.) Although it was never meant to be serviced or upgraded, it i
s possible to be refuelled robotically to prolong the life of the device.
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