Primary Mirror Size Comparison Between Webb and Hubble

Webb Telescope and Hubble Telescope primary mirror comparison with person as reference. The James Webb Space Telescope primary mirror is 6.5 meters (21 feet 4-inches) across. The Hubble Space Telescope primary mirror is 2.4 meters (8-feet) across. The Webb Telescope’s longest segment is its sunshield at meters (69.5 feet) long. The Hubble Space Telescope is 13.2 meters (43.5 feet) long. Download: Credit: NASA Goddard Michael McClare (KBRwyle): Lead Producer Aaron E