Primary Mirror Size Comparison Between Webb and Hubble

  • Released Tuesday, January 14th, 2020
  • Updated Wednesday, May 3rd, 2023 at 1:45PM
  • ID: 13521

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 21.18 meters (69.5 feet) long. The Hubble Space Telescope is 13.2 meters (43.5 feet) long.

Webb Telescope and Hubble Telescope primary mirror comparison.

Three rotations of Webb Telescope and Hubble Telescope primary mirror comparison with person as reference.

Credits

Please give credit for this item to:
NASA's Goddard Space Flight Center

Missions

This visualization is related to the following missions: