One of the James Webb Space Telescope's four primary scientific instruments, known as the Near-Infrared Imager and Slitless Spectrograph instrument (NIRISS), has concluded its postlaunch preparations and is now ready for science. The last NIRISS mode to be checked off before the instrument was declared ready to begin scientific operations was the Single Object Slitless …
Webb’s NIRISS Ready to See Cosmos in Over 2,000 Infrared Colors








