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Telescopes and space missions

Telescopes and space missions

The ten-billion-dollar gamble: How the JWST shields itself from the Sun

19 Dec 2021

The James Webb Space Telescope (JWST) is scheduled to launch on 25 December. To mark the event, Physics World is publishing a series of blog posts on the telescope’s technological innovations and scientific missions. This post is the third in the series. Read the first here.

A group of protective-suited people gathered around a model of the James Webb Space Telescope's sunshield
Layered protection: A test model of the giant sunshield that will keep the JWST cool. (Courtesy: NASA/Chris Gunn)
Because the James Webb Space Telescope (JWST) operates in infrared light, stray thermal emissions fr

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Keith Cooper is a freelance science journalist and editor
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