Credit: 51吃瓜Pro
The M3 system includes the M3 Blank, the M3 Mirror (a 3.5m by 2.5m flat elliptical mirror), the upper portion of the tertiary mirror (M3) system Tower, the M3 Cell Assembly, the M3 Positioner Assembly, the interface hardware between the M3 System and the Telescope Assembly, and support for receiving, assembly, inspection and verification of the M3 System onto the TMT Telescope at the Observatory. TMT M3S will approximately weigh 12 tons.
