From NASA: “Tests Under way on the Sunshield for NASA’s Webb Telescope”

NASA is testing an element of the sunshield that will protect the James Webb Space Telescope’s mirrors and instruments during its mission to observe the most distant objects in the universe.

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The five-layer James Webb Space Telescope sunshield consists of thin membranes made from a polymer-based film and supporting equipment such as spreader bars, booms, cabling, and containment shells. Designed to block solar light and keep the Observatory operating at cryogenic temperatures. Credit: NASA/Northrop Grumman

The sunshield will consist of five tennis court-sized layers to allow the Webb telescope to cool to its cryogenic operating temperature of minus 387.7 degrees Fahrenheit (40 Kelvin). “

See the full article here.


The James Webb Space Telescope

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