James Webb Space Telescope experts give real-time updates in the final stages of the telescope’s sunshield deployment. A major milestone, the successful shield tensioning will ensure Webb’s mirrors stay cold enough to #UnfoldTheUniverse.<br /><br />The five-layer, tennis court-sized sunshield is a critical part of the telescope because the infrared cameras and instruments aboard must be kept very cold and out of the Sun's heat and light to function properly.<br /><br />About the sunshield: <a href="https://webb.nasa.gov/content/observatory/sunshield.html" target="_blank" rel="nofollow">https://webb.nasa.gov/content/observatory/sunshield.html</a><br />Where is Webb?: <a href="https://www.jwst.nasa.gov/content/webbLaunch/whereIsWebb.html" target="_blank" rel="nofollow">https://www.jwst.nasa.gov/content/webbLaunch/whereIsWebb.html</a><br /> <br />Credit: NASA<br />...<br /><a href="https://www.youtube.com/watch?v=IBPNi7uGgWM" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=IBPNi7uGgWM</a>