Science & Technology - 1st prize
Roger H. Ressmeyer
Ressmeyer-Starlight for National Geographic
Ressmeyer-Starlight for National Geographic
01 January, 1993
Carbon dioxide snow is used to clean the telescope at Keck Observatory. This is the world's largest mirror, consisting of 36 hexagonal segments. Leading edge technology enables scientists to examine even the most remote reaches of the universe. Distorting atmospheric effects are studied with the aid of laser beams, and computers use telescope optics to create images of unprecedented clarity.