NASA’s most powerful space telescope ever is ready for preflight testing

The telescope portion of NASA’s James Webb Telescope is finally complete — marking a major benchmark for the spacecraft that has been in development for the past 20 years. NASA Administrator Charles Bolden and other members of the James Webb mission team discussed the milestone with a group of reporters today at Goddard Space Flight Center, where the telescope has been undergoing its assembly. Now that the telescope’s optics are complete, it will undergo a series of rigorous pr