How is the primary mirror surface of each telescope at the W. M. Keck Observatory constructed?

Answer

It utilizes 36 precisely aligned hexagonal segments to form the surface.

The Keck telescopes employ a revolutionary segmented design, where 36 hexagonal segments come together to form the 10-meter diameter mirror surface. This approach allowed for mirrors larger than what could be cast as a single piece at the time of construction.

How is the primary mirror surface of each telescope at the W. M. Keck Observatory constructed?
locationastronomytelescopeobservatory