Webb Telescope's first primary mirror meets cold temperature specifications, sets program landmark
Monday, March 8, 2010 - 00:35
in Astronomy & Space
The James Webb Space Telescope reached a mission-readiness landmark March 2, 2010 when its first primary mirror segment was cryo-polished to its required prescription as measured at operational cryogenic temperatures. This achievement sets the stage for a successful polishing process for the remaining 18 flight mirror segments.