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Record #00205Space archive

Space Telescope with the Largest Primary Mirror

The space telescope record measured by primary mirror diameter.

Archive status
Verified · current
Last updated
2026-10-07
Category index
Space

ARCHIVE VISUAL / 01

NOT TO SCALE

Current Record

about6.5metres

Current record value

Holder
James Webb Space Telescope
Location
—
Start date
2021-12-25
Record status
Verified · currentReport an issue
OverviewRecord historyRelated recordsSources

Overview

Archive Note

The James Webb Space Telescope uses 18 hexagonal mirror segments to form its primary mirror.

NASA states that Webb's approximately 6.5-metre primary mirror is the largest ever launched into space.

Key information

Primary mirror diameter
about 6.5 m
Mirror segments
18
Launch date
25 December 2021

Record history

1 Milestones
  1. 2021-12-25about 6.5 metresJames Webb Space TelescopeCurrent Record

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Sources

Evidence & References
Source IDSourcePublisherLink
SRC-001Webb's MirrorsOfficialENCurrent recordNASA Science

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