Engineers inside the world's largest clean room at Goddard are working on "Pathfinder" for the James Webb Space Telescope.
Engineers inside the world’s largest clean room at NASA’s Goddard Space Flight Center in Greenbelt, Maryland are working on the engineering test unit or “Pathfinder,” for the James Webb Space Telescope. Webb’s Pathfinder acts as a spine supporting the telescope primary mirror segments. The Pathfinder is a non-flight prototype. To install the mirrors onto the center structure, the pathfinder must be first be over-deployed, that means engineers must secure two of the struts against the wall so they have plenty of room to work. Image credit: Chris Gunn/Text credit: Laura Betz
NASA’s Goddard Space Flight Center