The second of four main instruments to fly aboard NASA's James Webb Space Telescope (Webb) has been delivered to NASA. The Fine Guidance Sensor (FGS) will enable the telescope to accurately and precisely point at the correct, intended objects for it to observe. The FGS is packaged together as a single unit with the Near-Infrared Imager and Slitless Spectrograph (NIRISS) science instrument.
Nov. 16, 2012
The late delivery of pair of critical instruments for the James Webb Space Telescope (JWST) poses no threat either to the flagship observatory’s development costs or launch date, a senior NASA official said Nov. 15.