Current Segmented-mirror Telescopes
These include, but are not limited to:
- The twin W. M. Keck Telescopes
- The Hobby-Eberly Telescope
- The Southern African Large Telescope
- The Gran Telescopio Canarias (GTC) 36 segmented mirror
The James Webb Space Telescope's 18 mirror segments have mostly been fabricated as of spring 2011 but the spacecraft is not expected to be launched until 2017 or 2018.
Read more about this topic: Segmented Mirror
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