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James Webb telescope going through cooling process

Cooling things down in space is trickier than it might sound. But that is exactly the process the James Webb telescope is going through right now. Getting down to cryogenic temperature is imperative for its infrared imaging systems to work correctly. While the telescope has already started, it will be another few weeks before the process is complete and it's ready to start capturing its first groundbreaking infrared images of the universe.
That might seem like an exceptionally long time to cool something down, but it's all part of the difficulty of doing so in space. The first tricky point is getting out of the sun, which can heat equipment up to blistering temperatures if it is exposed to direct sunlight. Luckily, James Webb has a specially designed sun shield to keep it out of direct sunlight.
The rest of the telescope's instruments have been cooling since the sunshield was deployed several weeks ago.