When the Multiple-Mirror Telescope
opened on Mount Hopkins, Arizona, in 1979, its six-mirror objective was a marvel of engineering and dynamic computer control.
For example, an experiment at the Steward Observatory's Multiple-Mirror Telescope
attained 0.1-arc-second resolution at 3.4 microns, and Julian C.
Ketelsen discussed his work with the newly spin-cast, 6.5-meter mirror destined to upgrade the multiple-mirror telescope
atop Mount Hopkins in Arizona.
The NNTT, a proposed multiple-mirror telescope
, would employ four separate mirrors to act together to simulate a single mirror 15 meters across, or to act separately.
Yet, as Donald Hall, director of the University of Hawaii's Institute for Astronomy, pointed out last June, "The infrared-optimized 8-meter on Mauna Kea represents a considerable scaling-down of AURA's ambitious [1980s] plans to build a 16-meter equivalent aperture multiple-mirror telescope
." True, but an infrared-optimized 8-meter was still the highest-ranked ground-based project recommended for construction in the 1990s by the Bahcall committee.