Gemini ObservatoryFrom Astronomy Encyclopedia
Major international facility consisting of two identical 8.1-m (27-ft) optical/infrared instruments, the Gemini Telescopes, one at Mauna Kea Observatory (Gemini North), dedicated in 1999 June, and the other on the 2715-m (8910-ft) high ridge of Cerro Pachón in the Chilean Andes.