James Webb Space Telescope extends secondary mirror - BBC News
Hubble Space Telescope Backup Mirror | National Air and Space Museum
Behind James Webb Space Telescope's iconic mirror | Space
Mirror substrates and glass-ceramics for telescopes | SCHOTT
Observatory - Optics | NASA
Honeycomb mirror - Wikipedia
Hubble - Construction, The Hubble Mirror, Blurred Vision, Hubbles Contact Lens
Space telescope's beryllium mirrors
Hubble Space Telescope's Internal Components (Light Path)
Hubble - Construction, The Hubble Mirror, Blurred Vision, Hubbles Contact Lens
ESA - The largest infrared space telescope
File:Six of the 18 James Webb Space Telescope mirror segments.jpg - Wikimedia Commons
Observatory - Optics | NASA
What was wrong with Hubble's mirror, and how was it fixed? | BBC Sky at Night Magazine
Telescope Primary Mirror Sizes Compared
No. 26 - 2008: IRTF to Get New Secondary Mirror
NASA Completes Giant Mirrors for Hubble Successor Telescope | Space
Observatory - Optics | NASA
Hubble's Mirror Flaw | NASA
The testing error that led to Hubble mirror fiasco | New Scientist
Optical Telescope Element - Wikipedia
L3Harris Completes The Primary Mirror For NASA's Roman Space Telescope – SatNews
