NASA's Infrared Telescope Facility atop Mauna Kea, Hawaii
Feb. 3, 2010
NASA's Infrared Telescope Facility atop Mauna Kea, Hawaii. The IRTF is a venerable 30-year-old, 3-meter-diameter (10-foot) telescope that ranks 40th among ground-based telescopes. Photograph copyright Ernie Mastroianni.