James Webb Telescope 'Pathfinder' Replica Completes First Cryogenic Optics Test

The ‘Pathfinder’ enters Chamber A at NASA’s Johnson Space Center. Image Credit: NASA/Chris Gunn

If there is one mantra that drives the development of space mission projects, it’s ‘test, test, test’. Before every successful manned or robotic mission has ever flown to space countless man-hours were devoted for extensive and rigorous testing on […]

NASA Webb Telescope’s Mammoth Mirror Tripod Gets Tested in Action

Inside a giant clean room at NASA’s Goddard Space Flight Center in Greenbelt, Md., the pathfinder telescope, a practice section of the James Webb Space Telescope, stands fully assembled. Teams of engineers built and aligned the pathfinder telescope to rehearse assembly and testing before the actual telescope is built. Credit: NASA/Chris Gunn

NASA […]