This image dates to April 2021.
<p>These images were captured during Webb's final tests when the 6.5 meter (21 feet 4 inch) mirror was commanded to fully expand and lock itself into place, just like it would in space. The conclusion of this test represents the team’s final checkpoint in a long series of tests designed to ensure Webb’s 18 hexagonal mirrors are prepared for a long journey in space, and a life of profound discovery. After this, all of Webb’s many movable parts will have confirmed in testing that they can perform their intended operations after being exposed to the expected launch environment. 
</p><p>Read more: www.nasa.gov/feature/goddard/2021/webb-s-golden-mirror-wi...
</p><p>Image credit: Northrop Grumman
</p><p>NASA Media Use Policy
</p><p>Follow us on Twitter
</p><p>Like us on Facebook
</p><p>Subscribe to our YouTube channel
</p>
Follow us on Instagram
James Webb Space Telescope
CC BY 2.0
<a rel="nofollow" class="external free" href="https://www.flickr.com/photos/50785054@N03/51539901508/">https://www.flickr.com/photos/50785054@N03/51539901508/</a>