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The Pathfinder is the largest intact mirror support structure of its kind, comprised of exotic lightweight materials invented for the purpose of seeing near to the very limits of the observable universe.

This unique piece of hardware served a critical role in ensuring mission success by enabling engineers to build a comprehensive testing program to validate and ensure the most complicated optical system ever built would work flawlessly after launch.
For more information, visit https://nasa.gov/webb

Credit:
Producer / Writer: Thaddeus Cesari
Editor: Paul Morris
Images: NASA, ESA, CSA, STSci
Special Thanks to the Smithsonian's National Air and Space Museum

Music Credit:
“History in Motion” by Fred Dubois [SACEM], Koka Media [SACEM], Universal Publishing Production Music France [SACEM], and Universal Production Music.
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