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Tmtprimarymirror oct.2018

Artist Concept of TMT Primary Mirror

October 12th, 2018

Credit: TMT International Observatory

The TMT primary mirror is segmented comprising a total of 492 hexagonal segments, each about 1.44 meters (56.6 inches) across corners. The segments fit very closely together, and are spaced with gaps of only 2.5 mm (0.1 inch).