but doing this in space will be nail—biting. it's made of floppy material, it has to be held on to by a series of pins, which release one by one, pull it out, make it tight, release another bit, pull it out again. until slowly, over days, you pull out this tennis court sized object. so, for many people working on the project, that's where the real nerves are. the sun shield protects the telescope from the heat and light of the sun. the difference between the hot and cold sides is huge — 300 degrees celsius. the telescope needs to operate in the coldest and darkest conditions to see the most distant stars. for the first time, we'll be able to see all the way back to the time when these very first galaxies formed. and that will allow us to actually get images of them, verify that they are the very first galaxies, and then we can study how galaxies have evolved over the history of the universe. the images that eventually come back
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