Webb Telescope Mirror Canisters
Four of the finished mirrors that will fly aboard NASA's James Webb Space Telescope arrived at NASA's Goddard Space Flight Center in Greenbelt, Md. Three primary mirrors and the one secondary mirror are now at Goddard. In this photo, an engineer guides one of the canisters containing a mirror segment while two other containers housing mirrors appear in the foreground. More information: www.jwst.nasa.gov.
Credit: NASA/Desiree Stover